The following error message was found in the web log on the STS server:
[11] RstsAccessFacade LogTaskResult - Query returned 400 Bad Request False
[11] RstsAccessFacade LogTaskResult - Content = <?xml version="1.0" encoding="utf-8"?><m:error xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"><m:code>InvalidOperationException</m:code><m:message xml:lang="en-US">This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.</m:message><m:innererror><m:message>This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.</m:message><m:type>System.InvalidOperationException</m:type><m:stacktrace> at System.Security.Cryptography.MD5CryptoServiceProvider..ctor()</m:stacktrace></m:innererror></m:error>
This is showing an error regarding FIPS cryptography in Windows.