Many error messages since update to NC 11 beta 2

Hello, I updating from nextcloud 10.0.0.1 to NC 11 BETA 2. now I have these error message whenever I connect to my cloud.
Is this an error of the music app? The app works fine…

ErrorPHP2016-12-02T00:37:06+0100
Object of class OCA\Music\App\Music could not be converted to string at /var/www/vhosts/land-laeufer.de/cloud.land-laeufer.de/nextcloud/lib/private/legacy/app.php#81
ErrorPHP2016-12-02T00:37:06+0100
trim() expects parameter 1 to be string, object given at /var/www/vhosts/land-laeufer.de/cloud.land-laeufer.de/nextcloud/lib/private/legacy/app.php#628
ErrorPHP2016-12-02T00:37:06+0100
Illegal offset type in isset or empty at /var/www/vhosts/land-laeufer.de/cloud.land-laeufer.de/nextcloud/lib/private/legacy/app.php#692
ErrorPHP2016-12-02T00:37:06+0100
Illegal offset type at /var/www/vhosts/land-laeufer.de/cloud.land-laeufer.de/nextcloud/lib/private/AppConfig.php#193

For beta versions it is better to post issues directly to the bugtracker. It’s a busy time for developers and they are not always checking the forum (filtering for beta-testing messages is a bit hard).

By disabling the music app you can easily find out if this app is creating the issue.

Okay thanks, I will do it.