Remote server offline since update

Server Version#: 1.43.3.10896 (QNAP NAS) TS-431P
Player Version#:Version 1.115.0.426-4e960a1d (windows)

I was having trouble with the samsung tv last night and I can see that the Plex update has been rolled back and should now work.

I was using my phone to cast last night and it worked fine

Today I have tried computer (plex forced and update before it opened) and phone (probably updated last night too as its on auto update) and neither are working. Saying my server is unreachable (remote viewing).

I booted the Samsung TV and I could browse all the server contents and even see new stuff I added today with the broken version of plex. Re-installing the plex app on the samsung TV (to roll back to the older working version) now gives the same error as the phone and laptop. I don’t think there is a remote server issue because of the above working on the TV before rollback and I can access the remote server without issue to see files etc.

I even installed the latest plex server version on the QNAP NAS (ver at the top) and made no difference.

Anyone else having the same issue or got any ideas? I think it is another plex bug.

Thanks