Fatal error: Uncaught TypeError: Argument 2 passed to HTMLMultiDoc::__construct() must be an instance of ContentType or null, string given, called in /srv/www/htdocs/credits.php on line 5 and defined in /srv/www/htdocs/lib/php/classes/HTMLMultiDoc.php:11 Stack trace: #0 /srv/www/htdocs/credits.php(5): HTMLMultiDoc->__construct() #1 {main} thrown in /srv/www/htdocs/lib/php/classes/HTMLMultiDoc.php on line 11