Fatal error: Uncaught Error: Interface "Opis\Closure\ISecurityProvider" not found in /opt/lampp/htdocs/forum/flarum/vendor/opis/closure/src/SecurityProvider.php:10 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/opis/closure/src/SecurityProvider.php on line 10