Fatal error: Uncaught RuntimeException: Cannot set the alias loader, as it is already registered! in /var/www/html/dev.hallescherfc.de/vendor/typo3/class-alias-loader/src/ClassAliasMap.php:72 Stack trace: #0 /var/www/html/dev.hallescherfc.de/vendor/typo3/alias-loader-include.php(9): TYPO3\ClassAliasLoader\ClassAliasMap::setClassAliasLoader() #1 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/class-alias-loader/src/ClassAliasMap.php on line 72