Certificate errors when nothing has changed in the setup are usually related to time. Like the certificate expiring or the time synchronization between server and client being off.
You may want to take a look at thisblog with some tips on solving some connection issues.
I have not come across your specific error on parsing the UTC time, so I will dig aorund to try to get info on that.
The actual FW version where it was first fixed was 22.214.171.1243v3.