AudioPlayer error on install

Error PHP Undefined variable: SQL at /var/www/nextcloud/apps/audioplayer/lib/Controller/CategoryController.php#129

Ubuntu 16.04
Nextcloud 12.0.0
AudioPlayer 2.02

Scan also fails to find any files


as answered on GIT, the ā€œundefined variableā€ will be caught correctly with the next release.
This is not a functional error - only a notice from PHP. The reason that its reported as error indicates an strange config in php.ini