Can't Seem to Logon to PMS - Will not accept my credentials

I’m running the last version of the Plex Media Server that is compatible with Windows XP, and everything was running fine until yesterday. At least that’s when I started running into issues. I can logon to the Plex Website, and the main logon in the Server, but when I go into settings and try to enter my credentials, I keep getting an error that says there was an issue logging on to the server. Not sure what is going on, losing my mind. My ports are forwarded correctly, and I have tested them and all seems ok. The server does work when I try to use it from within my network. What is going on???

Thanks,
Pmoore6

Windows XP isn’t support by MS anymore at all. It has been some time now. After MS dropped support, Plex was forced to as well. I am surprised it’s worked this long. Unfortunately, you have no choice but up step up to Windows 7 or newer.