AlbumArtist error message

[Statto]

I've recently upgraded to MinimServer 2 on my QNAP and also purchased a full licence.

Since upgrading, I've experienced a few issues with the BubbleDS app not connecting properly with the server (the library shows on the app but the Now Playing screen is blank). Anyone aware of any compatibility issues between MinimServer 2 and Bubble DS? I'm using BubbleDS version 3.5.4 on an Android phone.

I've also picked up an error on the MinimServer status page. It displays an error as follows:

MinimServer: incorrect role 'albumartist' in option 'AlbumArtist.displayRole' in property 'tag Custom'

I've not changed anything with my tags since upgrading and everything was working before so not sure why I'm getting the error. Any ideas?