Music App does not start anymore

I'm running Ubuntu Touch 20.04, dev channel, on a Fairphone 3.

Since the update of Music to Version 3.3.0 the app does not start anymore. I add the log, music.upborts.log , the first to lines can be found in quite a few logs for different, but working apps, so they seem to be harmless. The last line could indicate a problem with rights, but when removing the directory in question, the next start only leads to another error and lists another directory with ostensible missing rights and so on. All those directories are accessible for other apps.

I don't understand the messages regarding AppArmor, perhaps there is something amiss?

Any ideas how to solve this issue?

Best Regards Hank