{QNAP TS453A/4.5.1.480/1.7)Core Machine (Operating system/System info/Roon build number)
I updated my IOS devices first and then I found out that there is not an update for ROON 1.8 is available for my QNAP NAS.
So now I can’t acces my ROON endpoints anymore.
**QNAP TS453A, Cisco Meraki switch - Netgear switch - MOON 390 **
Problem solved. Tried to update the core within QNAP app instead of the IOS app.