Fatal error: Uncaught InvalidArgumentException: $className "\TYPO3\CMS\Core\Error\ProductionExceptionHandler" must not start with a backslash. in /var/www/ostfalia-relaunch/releases/250715-2147/vendor/typo3/cms-core/Classes/Utility/GeneralUtility.php:2960 Stack trace: #0 /var/www/ostfalia-relaunch/releases/250715-2147/vendor/typo3/cms-core/Classes/Core/Bootstrap.php(457): TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance() #1 /var/www/ostfalia-relaunch/releases/250715-2147/vendor/typo3/cms-core/Classes/Core/Bootstrap.php(95): TYPO3\CMS\Core\Core\Bootstrap::initializeErrorHandling() #2 /var/www/ostfalia-relaunch/releases/250715-2147/public/index.php(20): TYPO3\CMS\Core\Core\Bootstrap::init() #3 /var/www/ostfalia-relaunch/releases/250715-2147/public/index.php(21): {closure}() #4 {main} thrown in /var/www/ostfalia-relaunch/releases/250715-2147/vendor/typo3/cms-core/Classes/Utility/GeneralUtility.php on line 2960