Warning: Undefined variable $pickerClass in /users/quirl/www/filemanager/spark/protected/humhub/modules/ui/filter/widgets/views/pickerInput.php on line 18

Fatal error: Uncaught TypeError: call_user_func(): Argument #1 ($callback) must be a valid callback, invalid function name in /users/quirl/www/filemanager/spark/protected/humhub/modules/ui/filter/widgets/views/pickerInput.php:18 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/ui/filter/widgets/views/pickerInput.php on line 18