Fatal error: Uncaught Error: Interface "PHPStan\Rules\Rule" not found in /opt/lampp/htdocs/forum/flarum/vendor/composer/pcre/src/PHPStan/InvalidRegexPatternRule.php:24 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/composer/pcre/src/PHPStan/InvalidRegexPatternRule.php on line 24