Fatal error: Uncaught Error: Class "core_h5p\local\library\handler" not found in /var/www/clients/client1/web2/web/h5p/h5plib/v126/classes/local/library/handler.php:26 Stack trace: #0 {main} thrown in /var/www/clients/client1/web2/web/h5p/h5plib/v126/classes/local/library/handler.php on line 26