Test Connection fails after setting up new VCS root of type CVS

Hello,

I am using TeamCity 2017.1.3 and attempting to set up a VCS root for my project of type CVS using SSH. I have converted my .ppk key to be an openssh key using PuttyGen and I have uploaded the SSH key to my project. In my VCS option for Private key, I set it to the full path to the openssh key file on my hard drive. My attempts at getting this to work have been unsuccessful and I keep getting the following error message after selecting Test Connection from the TeamCity web UI.

************************************************************************************************************************************

cvs: unknown option -- S
Usage: cvs rlog [-lRhtNb] [-r[revisions]] [-d dates] [-s states]
    [-w[logins]] [files...]
-l Local directory only, no recursion.
-R Only print name of RCS file.
-h Only print header.
-t Only print header and descriptive text.
-N Do not list tags.
-b Only list revisions on the default branch.
-r[revisions] Specify revision(s) to list.
   rev1:rev2   Between rev1 and rev2, including rev1 and rev2.
   rev1::rev2  Between rev1 and rev2, excluding rev1 and rev2.
   rev:        rev and following revisions on the same branch.
   rev::       After rev on the same branch.
   :rev        rev and previous revisions on the same branch.
   ::rev       Before rev on the same branch.
   rev         Just rev.
   branch      All revisions on the branch.
   branch.     The last revision on the branch.
-d dates Specify dates (D1<D2 for range, D for latest before).
-s states Only list revisions with specified states.
-w[logins] Only list revisions checked in by specified logins.
(Specify the --help global option for a list of other help options)

************************************************************************************************************************************

This error message is confusing me because CVS doesn't even have a -S command line argument. Does anyone have any suggestions on how to fix this?