Minimserver 2.2 Update 248 - problems encountered

[viperrabbit]

I am using Minimserver as the music library for my Lumin player. Minimserver is running v2.2 update 248 on ASUSTOR NAS.

1. Two nights ago, I downloaded v2.2 update 248.
2. This was followed by adding some music files to the library and rescanning Minimserver.
3. When I tried to play music on the Lumin U2 mini, there were some problems with the playback (later found out to be loose cable), so I thought that it was related to the Minimserver upgrade.
4. I therefore reloaded the entire music library. That did not solve the problem.
5. Long story short, I ended up clearing the cache on the Minimserver and rebuild the library from scratch.
6. As a result, I had to reload the music library on the Lumin app as well.
7. After the reload, my entire set of icons to select songs, albums, artists, genres are gone from the Lumin app. Refer to attached pictures. I have checked with the Lumin customer service and they advised to contact Minimserver.

Here I am. How do I troubleshoot this problem. In the worst case, how can I roll back to update 247?

Looking forward to your help. Thank you.