All pages return 404 after upgrading to 2026.1

I've tried removing the queue-pauser plugin from disabled-plugins.xml and am still getting the 404s, but with a different set of errors in the log.   2025.x had been complaining that the queue-pauser had a error, which is why it was disabled.

/run-server.sh
TeamCity server.xml parameter: -config conf/server.xml
Java executable is found: '/opt/java/openjdk/bin/java'
2026-05-28 15:02:49 BST: Starting TeamCity server
2026-05-28 15:02:49 BST: TeamCity process PID is 147
NOTE: Picked up JDK_JAVA_OPTIONS:  --add-opens jdk.management/com.sun.management.internal=ALL-UNNAMED -XX:+IgnoreUnrecognizedVMOptions -Djava.security.manager=allow --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED
28-May-2026 15:02:49.659 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version name:   Apache Tomcat/9.0.117
28-May-2026 15:02:49.665 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built:          Mar 30 2026 18:21:16 UTC
28-May-2026 15:02:49.665 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version number: 9.0.117.0
28-May-2026 15:02:49.665 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name:               Linux
28-May-2026 15:02:49.665 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:            5.4.0-216-generic
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture:          amd64
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home:             /opt/java/openjdk
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version:           21.0.10+7-LTS
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor:            Amazon.com Inc.
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE:         /opt/teamcity
28-May-2026 15:02:49.666 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME:         /opt/teamcity
28-May-2026 15:02:49.680 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=jdk.management/com.sun.management.internal=ALL-UNNAMED
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:+IgnoreUnrecognizedVMOptions
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.security.manager=allow
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.lang=ALL-UNNAMED
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.lang.invoke=ALL-UNNAMED
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.lang.reflect=ALL-UNNAMED
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.io=ALL-UNNAMED
28-May-2026 15:02:49.681 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.util=ALL-UNNAMED
28-May-2026 15:02:49.682 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.base/java.util.concurrent=ALL-UNNAMED
28-May-2026 15:02:49.682 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED
28-May-2026 15:02:49.682 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/opt/teamcity/conf/logging.properties
28-May-2026 15:02:49.682 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dsun.io.useCanonCaches=false
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dorg.apache.catalina.security.SecurityListener.UMASK=0027
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Xmx2g
28-May-2026 15:02:49.683 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -XX:ReservedCodeCacheSize=640m
28-May-2026 15:02:49.684 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dteamcity.configuration.path=../conf/teamcity-startup.properties
28-May-2026 15:02:49.684 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dlog4j2.configurationFile=file:/opt/teamcity/bin/../conf/teamcity-server-log4j.xml
28-May-2026 15:02:49.684 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dteamcity_logs=/opt/teamcity/bin/../logs
28-May-2026 15:02:49.684 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.awt.headless=true
28-May-2026 15:02:49.684 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=
28-May-2026 15:02:49.685 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/opt/teamcity
28-May-2026 15:02:49.685 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/opt/teamcity
28-May-2026 15:02:49.685 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/opt/teamcity/temp
28-May-2026 15:02:49.687 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The Apache Tomcat Native library which allows using OpenSSL was not found on the java.library.path: [/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib]
28-May-2026 15:02:50.149 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8111"]
28-May-2026 15:02:50.172 INFO [main] org.apache.catalina.startup.Catalina.load Server initialization in [721] milliseconds
28-May-2026 15:02:50.214 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
28-May-2026 15:02:50.214 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet engine: [Apache Tomcat/9.0.117]
28-May-2026 15:02:50.219 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/opt/teamcity/webapps/ROOT]
2026-05-28T14:02:57.504337438Z main INFO Starting configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:00:55.786Z]...
2026-05-28T14:02:57.506890505Z main INFO Configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:00:55.786Z] started.
2026-05-28T14:02:57.508603956Z main INFO Stopping configuration org.apache.logging.log4j.core.config.DefaultConfiguration@54b3b458...
2026-05-28T14:02:57.509099890Z main INFO Configuration org.apache.logging.log4j.core.config.DefaultConfiguration@54b3b458 stopped.
Using logs directory "/opt/teamcity/logs"
2026-05-28T14:02:57.878323506Z main INFO Starting configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:02:57.727Z]...
2026-05-28T14:02:57.878685798Z main INFO Configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:02:57.727Z] started.
2026-05-28T14:02:57.879081901Z main INFO Stopping configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:00:55.786Z]...
2026-05-28T14:02:57.880790512Z main INFO Configuration XmlConfiguration[location=/opt/teamcity/conf/teamcity-server-log4j.xml, lastModified=2026-05-28T14:00:55.786Z] stopped.
Log4J configuration file /opt/teamcity/bin/../conf/teamcity-server-log4j.xml will be monitored with interval 10 seconds.
28-May-2026 15:02:57.909 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/opt/teamcity/webapps/ROOT] has finished in [7,689] ms
28-May-2026 15:02:57.913 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8111"]
28-May-2026 15:02:57.935 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in [7762] milliseconds
TeamCity version: 2026.1 (build 222521), data format version 1039
OS: Linux, version 5.4.0-216-generic, amd64, Current user: tcuser, Time zone: BST (UTC+01:00)
Java: 21.0.10, OpenJDK 64-Bit Server VM (21.0.10+7-LTS, mixed mode, sharing), OpenJDK Runtime Environment (21.0.10+7-LTS), Amazon.com Inc.; JVM parameters: --add-opens=jdk.management/com.sun.management.internal=ALL-UNNAMED -XX:+IgnoreUnrecognizedVMOptions -Djava.security.manager=allow --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.rmi/sun.rmi.transport=ALL-UNNAMED -Djava.util.logging.config.file=/opt/teamcity/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dsun.io.useCanonCaches=false -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Xmx2g -XX:ReservedCodeCacheSize=640m -Dteamcity.configuration.path=../conf/teamcity-startup.properties -Dlog4j2.configurationFile=file:/opt/teamcity/bin/../conf/teamcity-server-log4j.xml -Dteamcity_logs=/opt/teamcity/bin/../logs -Djava.awt.headless=true -Dignore.endorsed.dirs= -Dcatalina.base=/opt/teamcity -Dcatalina.home=/opt/teamcity -Djava.io.tmpdir=/opt/teamcity/temp
WARNING: A terminally deprecated method in java.lang.System has been called
WARNING: System::setSecurityManager has been called by jetbrains.buildServer.serverSide.impl.SecondaryNodeSecurityManager (file:/opt/teamcity/webapps/ROOT/WEB-INF/lib/ro-server-util.jar)
WARNING: Please consider reporting this to the maintainers of jetbrains.buildServer.serverSide.impl.SecondaryNodeSecurityManager
WARNING: System::setSecurityManager will be removed in a future release
[2026-05-28 15:03:08,663]   WARN [:57.670), node id: MAIN_SERVER] -   jetbrains.buildServer.UPDATE - Auto update is disabled: distribution is 'docker-ubuntu', but auto update supports only '.tar.gz' and '.exe' distributions
[2026-05-28 15:03:18,338]   WARN [:57.670), node id: MAIN_SERVER] - plugins.PluginsLookupCollector - The following plugins will not be loaded:
rake-runner[version: 222521, path: /opt/teamcity/webapps/ROOT/WEB-INF/plugins/rake-runner] - Plugin is disabled on this node, reason: the plugin was disabled manually
starteam[version: 222521, path: /opt/teamcity/webapps/ROOT/WEB-INF/plugins/starteam] - Plugin is disabled on this node, reason: this plugin is deprecated and will be removed in the future teamcity versions
[2026-05-28 15:03:19,803]   WARN [ad08866'; Processing plugins 2] - inLoader$TeamCityPluginContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jetbrains.buildServer.queueManager.server.QueuePausePrecondition#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jetbrains.buildServer.queueManager.settings.QueueStateManager#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [jetbrains.buildServer.queueManager.settings.QueueStateManager]: Constructor threw exception; nested exception is java.lang.NullPointerException
[2026-05-28 15:03:19,806]  ERROR [ad08866'; Processing plugins 2] - gins.spring.SpringPluginLoader - Error loading plugin 'queue-pauser': Failed to initialize spring context: Error creating bean with name 'jetbrains.buildServer.queueManager.server.QueuePausePrecondition#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jetbrains.buildServer.queueManager.settings.QueueStateManager#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [jetbrains.buildServer.queueManager.settings.QueueStateManager]: Constructor threw exception; nested exception is java.lang.NullPointerException

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'jetbrains.buildServer.queueManager.server.QueuePausePrecondition#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jetbrains.buildServer.queueManager.settings.QueueStateManager#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [jetbrains.buildServer.queueManager.settings.QueueStateManager]: Constructor threw exception; nested exception is java.lang.NullPointerException
       at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:794)
       at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:220)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
       at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:336)
       at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
       at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334)
       at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:209)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955)
       at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591)
       at jetbrains.buildServer.plugins.spring.SpringPluginLoader.pluginClassesLoaded(SpringPluginLoader.java:126)
       at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
       at java.base/java.lang.reflect.Method.invoke(Method.java:580)
       at jetbrains.buildServer.util.EventDispatcher.invokeListeners(EventDispatcher.java:150)
       at jetbrains.buildServer.util.EventDispatcher.dispatch(EventDispatcher.java:134)
       at jetbrains.buildServer.util.EventDispatcher$2.invoke(EventDispatcher.java:82)
       at jdk.proxy3/jdk.proxy3.$Proxy50.pluginClassesLoaded(Unknown Source)
       at jetbrains.buildServer.plugins.PluginManagerImpl$5.visitPlugin(PluginManagerImpl.java:470)
       at jetbrains.buildServer.plugins.PluginsCollection$1.run(PluginsCollection.java:98)
       at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
       at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
       at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
       at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
       at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jetbrains.buildServer.queueManager.settings.QueueStateManager#0' defined in Byte array resource [plugin: queue-pauser#queue-pauser-server-2026.1-222521.jar!/META-INF/build-server-plugin-queue-pauser.xml]: Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [jetbrains.buildServer.queueManager.settings.QueueStateManager]: Constructor threw exception; nested exception is java.lang.NullPointerException
       at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:306)
       at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:287)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
       at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
       at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:336)
       at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
       at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334)
       at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:209)
       at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311)
       at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:904)
       at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:781)
       ... 26 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [jetbrains.buildServer.queueManager.settings.QueueStateManager]: Constructor threw exception; nested exception is java.lang.NullPointerException
       at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:226)
       at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117)
       at jetbrains.buildServer.spring.InstantiationStrategySelector$1.instantiate(InstantiationStrategySelector.java:80)
       at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:302)
       ... 40 more
Caused by: java.lang.NullPointerException
       at java.base/java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011)
       at java.base/java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:1006)
       at java.base/java.util.Properties.put(Properties.java:1346)
       at java.base/java.util.Properties.setProperty(Properties.java:230)
       at java.base/java.lang.System.setProperty(System.java:1051)
       at jetbrains.buildServer.queueManager.settings.QueueStateManager.setSystemProperty(QueueStateManager.java:135)
       at jetbrains.buildServer.queueManager.settings.QueueStateManager.doLoad(QueueStateManager.java:161)
       at jetbrains.buildServer.queueManager.settings.QueueStateManager.<init>(QueueStateManager.java:98)
       at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
       at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
       at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
       at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:213)
       ... 43 more
[2026-05-28 15:03:32,914]   WARN [:57.670), node id: MAIN_SERVER] - mCityPluginIntermediateContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'jetbrains.buildServer.plugins.bean.PluginInfo' available
[2026-05-28 15:03:32,915]  ERROR [:57.670), node id: MAIN_SERVER] - gins.spring.SpringPluginLoader - Error loading plugin 'rest-api': Failed to initialize spring context: No qualifying bean of type 'jetbrains.buildServer.plugins.bean.PluginInfo' available

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'jetbrains.buildServer.plugins.bean.PluginInfo' available
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:351)
       at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:342)
       at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1189)
       at jetbrains.buildServer.plugins.spring.PluginSpringContextDependenciesInjectorImpl$InjectorBeanFactoryPostProcessor.postProcessBeanFactory(PluginSpringContextDependenciesInjectorImpl.java:128)
       at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:325)
       at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:148)
       at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:756)
       at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:573)
       at jetbrains.buildServer.plugins.spring.SpringPluginLoader.pluginClassesLoaded(SpringPluginLoader.java:120)
       at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
       at java.base/java.lang.reflect.Method.invoke(Method.java:580)
       at jetbrains.buildServer.util.EventDispatcher.invokeListeners(EventDispatcher.java:150)
       at jetbrains.buildServer.util.EventDispatcher.dispatch(EventDispatcher.java:134)
       at jetbrains.buildServer.util.EventDispatcher$2.invoke(EventDispatcher.java:82)
       at jdk.proxy3/jdk.proxy3.$Proxy50.pluginClassesLoaded(Unknown Source)
       at jetbrains.buildServer.plugins.PluginManagerImpl$5.visitPlugin(PluginManagerImpl.java:470)
       at jetbrains.buildServer.plugins.PluginsCollection.foreachLoadedPluginsAsync(PluginsCollection.java:114)
       at jetbrains.buildServer.plugins.PluginManagerImpl.firePluginClassesLoaded(PluginManagerImpl.java:467)
       at jetbrains.buildServer.plugins.PluginManagerImpl.doLoadPluginsCollection(PluginManagerImpl.java:410)
       at jetbrains.buildServer.plugins.PluginManagerImpl.loadPlugins(PluginManagerImpl.java:378)
       at jetbrains.buildServer.web.plugins.PluginManagerConfigurator.initializePlugins(PluginManagerConfigurator.java:8)
       at jetbrains.buildServer.web.impl.BuildServerConfigurator.loadConfiguration(BuildServerConfigurator.java:13)
       at java.base/java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:891)
       at jetbrains.buildServer.serverSide.impl.BuildServerLifecycleProcessor.doStartup(BuildServerLifecycleProcessor.java:1)
       at jetbrains.buildServer.maintenance.TeamCityDispatcherServlet$WebApplicationCreatorAndDestroyer.createApplication(TeamCityDispatcherServlet.java:27)
       at jetbrains.buildServer.maintenance.StartupProcessor.doApplicationStarting(StartupProcessor.java:52)
       at jetbrains.buildServer.maintenance.StartupProcessor$3.call(StartupProcessor.java:9)
       at jetbrains.buildServer.util.NamedThreadFactory.executeWithNewThreadName(NamedThreadFactory.java:92)
       at jetbrains.buildServer.maintenance.StartupProcessor.processConcreteStage(StartupProcessor.java:1502)
       at jetbrains.buildServer.maintenance.StartupProcessor.processConcreteStageSafe(StartupProcessor.java:789)
       at jetbrains.buildServer.maintenance.StartupProcessor.processTeamCityLifecycle(StartupProcessor.java:1338)
       at jetbrains.buildServer.maintenance.StartupProcessor$1.run(StartupProcessor.java:1)
       at java.base/java.lang.Thread.run(Thread.java:1583)
[2026-05-28 15:03:32,923]  ERROR [:57.670), node id: MAIN_SERVER] - gins.spring.SpringPluginLoader - Error loading plugin 'rest-api-contrib': Failed to initialize spring context: Cannot inject dependencies as 1 parent is not available (failed to initialize properly?): Spring context for plugin 'rest-api' is missing.
[2026-05-28 15:03:32,927]  ERROR [:57.670), node id: MAIN_SERVER] - gins.spring.SpringPluginLoader - Error loading plugin 'teamcity-compare-builds': Failed to initialize spring context: Cannot inject dependencies as 1 parent is not available (failed to initialize properly?): Spring context for plugin 'rest-api' is missing.
=======================================================================
TeamCity initialized, server UUID: **, URL: **
TeamCity is running in professional mode
[TeamCity] Super user authentication token: ** (use empty username with the token as the password to access the server)
[2026-05-28 15:04:25,814]  ERROR [0@98838'; Scheduled executor 5] -   jetbrains.buildServer.SERVER - Unable to initialize internal Rest Api Facade: no controllers are found for the '/app/rest/**' path. UI will not refresh.

Upload ID = 2026_05_29_MYm96dC98954HrXNxW4EMR

Nobody will have modified the file manually, queue pausing isn't something we've ever used.   

Anyway, re-adding the missing elements has resolved the issue.  Thanks for your help.