License Error 2:9255 6942

[golke53]

Good morning Simon,
take your time, no hurry. My Qnaps are
1. TS 453A with 4x 3TB and QTS4.4.3.1421
2. TS 439 Pro II+ with 4x 3TB and QTS 4.2.6 (20200821)

The 2nd is old and out of support receiving only security related updates based on 4.2.6. It works as a reltime backup system to my primary Qnap but has still the full funcionability incl. Minim.

Admittedly I only do updates to the NAS systems in maybe every 2 months or so as they work solely as music servers to my KDS. Trying to keep track with releases just for security and not for functional enhancements. Therefore it may be that the problem relates to an even earlier QTS release.
Last time I have been on the Minim configution page was in April when I upgraded to V2. I have been using Watch however frequently when loading new albums and applying a rescan. First time the problem occured was yesterday after QTS updates. I invoked Watch only because after QTS update was finished te server did not show up anymore in Kinsky/Kazoo and I wanted to check why.

Let me know if you need more info, happy to provide.
Detlev