You’re doing great so far. So you started PMS inside the App Center, and I saw how you dealt with downloading the update.
Try the Claim via the Browser Method on the (Re-)Claiming a QNAP Plex Media Server
If it works, let me know. It worked for me.
Leave PMS at the version 1.28.2 that it’s at for now.
You operating system could use the update to patch bugs in 5.0.
I’m holding back at 4.5.4 until I get a new NAS. My 451+ is really old.
