Fatal error: Uncaught Error: Interface "s9e\RegexpBuilder\Output\OutputInterface" not found in /opt/lampp/htdocs/forum/flarum/vendor/s9e/regexp-builder/src/Output/BaseImplementation.php:12 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/s9e/regexp-builder/src/Output/BaseImplementation.php on line 12