Thanks for the logs. I can see what’s happening.
The QNAP is at 10.30.0.10
The connection request - to claim - is coming from another subnet (10.10.0.52) and being declared WAN.
PMS cannot be claimed from a WAN connection.
Sep 13, 2021 18:17:07.008 [0x720d1d48] DEBUG - Request: [10.10.0.52:49653 (WAN)] GET /web/static/b38a559594ac52d049ba.png (5 live) GZIP
Either switch to the same subnet then open the QNAP again
-or-
execute a SSH-level claim. (can give instructions)
Which would you prefer ?