Error Message - Metadata improver halted. Says Roon needs an update but it doesn't

[grossmsj (Scott G)]

Sorry to see you are having the problem. Lots of others have run into too.
This seems to be a working solution:

Metadata Improver: “Halted. Roon needs a software update”

Ok, fixed it. Rebooting and hard power off and on many times did not help. But I got onto my SonicTransporter OS and turned off ROON Server app and then restarted it again. This stopped the continous uodating of database and error message about Metadat Improver is gone more importantly, all the Album art can now be displayed. Phew!.