Cannot use Zappiti Server on Synology after a reset

If you reset the Synology, it might be possible that you cannot use Zappiti Server anymore.
In fact, Mono package is not officially supported by Synology anymore.
So if you want to resolve this issue, you absolutely must uninstall Mono and Zappiti Server from your Synology first, then follow this article step by step to reinstall them correctly :

Feedback and Knowledge Base