Fatal error: Uncaught TypeError: method_exists(): Argument #1 ($object_or_class) must be of type object|string, null given in /home/sprachtestcom/public_html/system/libs/Bootstrap.php:103 Stack trace: #0 /home/sprachtestcom/public_html/system/libs/Bootstrap.php(103): method_exists(NULL, 'kategorien') #1 /home/sprachtestcom/public_html/system/libs/Bootstrap.php(44): Bootstrap->callMethod() #2 /home/sprachtestcom/public_html/index.php(15): Bootstrap->__construct() #3 {main} thrown in /home/sprachtestcom/public_html/system/libs/Bootstrap.php on line 103