Works inside album

[simoncn]

The Group tag (used by MinimServer) is not the same as Grouping in Jaikoz. Your tagFormat setting of Group.displayFormat={$composer^^: $group} needs the Group tag to be set correctly in your files.

I have tried doing the same thing with your configuration settings in Kinsky and the LUMIN app with the Group tag set correctly in the files and the display screens are correct in both Kinsky and the LUMIN app.

Grouping in Jaikoz is probably mapped to either Grouping or ContentGroup in MinimServer (depending on the format of your files) and you might be able to get correct results without retagging your files by setting

Grouping: Group, ContentGroup:Group

in the aliasTags property and restarting MinimServer.