Fatal error: Uncaught Error: Class "TYPO3\CMS\Install\ExtensionScanner\Php\Matcher\AbstractCoreMatcher" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/ExtensionScanner/Php/Matcher/PropertyProtectedMatcher.php:29 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/ExtensionScanner/Php/Matcher/PropertyProtectedMatcher.php on line 29