RPC FileSystem Error after upgrade

Decided to finally upgrade from 5 to 6 yesterday, then saw that 7 was also available to upgraded to 7, good timing.

So far so good, restored a few plugins that I'd removed, OMV Extras for Docker, but when looking through Settings, I noticed that the FileSystems were not coming up.

Instead of would show a 500 RPc err, to check syslog, but nothing was written to the syslog?

I've attached an image when trying to add an existing FileSystem, it says to Mount it, which also throws the same error that's also not logged? Is there something incompatible in my config?

Oh, no, I did not realise, but that makes sense. Thanks, will check the unionfs/mergerfs plugins.

I had to remove UnionFS plugin and add MergerFS plugin, then reboot. Seems to be showing Filesystems properly now, thanks!