Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Core\SystemEnvironmentBuilder" not found in /home/clients/8fe054c978e3aada1380311a9061c4f9/hetsl-t3-website/public/index.php:19 Stack trace: #0 /home/clients/8fe054c978e3aada1380311a9061c4f9/hetsl-t3-website/public/index.php(21): {closure}() #1 {main} thrown in /home/clients/8fe054c978e3aada1380311a9061c4f9/hetsl-t3-website/public/index.php on line 19