Hi @verhagen.andre, welcome to the community. It sounds like the Roon Server package on your QNAP is no longer starting properly, and the next step is to move over to the supported Docker setup.
Our diagnostic servers don’t show activity on any docker-based QNAP servers associated with your account since you last posted. We’re going to assume this issue is yet unresolved and you still need some more troubleshooting assistance here.
Have you set up Container Station? Please share a screenshot of what you currently see, if so.