Fatal error: Uncaught Error: Class "Illuminate\Database\Schema\ColumnDefinition" not found in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/database/Schema/ForeignIdColumnDefinition.php:7 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/illuminate/database/Schema/ForeignIdColumnDefinition.php on line 7