Fatal error: Uncaught Error: Interface "Psr\SimpleCache\CacheException" not found in /opt/lampp/htdocs/forum/flarum/vendor/psr/simple-cache/src/InvalidArgumentException.php:11 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/psr/simple-cache/src/InvalidArgumentException.php on line 11