After upgrade, I see ERROR in web.log. This appears to be the only error in logs.
The upgrade process went smoothly and DB was updated after upgrade without errors.
Release notes said to replace the mssql-jdbc_auth .dll file. Does that mean remove older versions of the auth.dll file? What about the mssql-jdbc-10.2.1.jre11.jar file? That was not mentioned in release notes and I did not upload that file.