Fatal error: Uncaught Error: Interface "Doctrine\DBAL\Schema\Synchronizer\SchemaSynchronizer" not found in /opt/lampp/htdocs/forum/flarum/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Synchronizer/AbstractSchemaSynchronizer.php:14 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/doctrine/dbal/lib/Doctrine/DBAL/Schema/Synchronizer/AbstractSchemaSynchronizer.php on line 14