System.ArgumentNullException after reinstall TortoiseHg/Mercurial

Hi,

After I install TortoiseHg and Mercurial to a new version and restart my server, my TeamCity get the following error when I try to access in a browser:

System.ArgumentNullException: Não foi anulada a serialização de nenhuma mensagem antes de chamar DispatchChannelSink.
Nome do parâmetro: requestMsg
   em System.Runtime.Remoting.Channels.DispatchChannelSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream)
   em System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream)
   em System.Runtime.Remoting.Channels.Http.HttpServerTransportSink.ServiceRequest(Object state)
   em System.Runtime.Remoting.Channels.SocketHandler.ProcessRequestNow()