Fatal error: Uncaught Error: Class 'TYPO3\CMS\Core\Configuration\ConfigurationManager' not found in /var/www/nan-minisites/public/typo3/sysext/core/Classes/Core/Bootstrap.php:303 Stack trace: #0 /var/www/nan-minisites/public/typo3/sysext/core/Classes/Core/Bootstrap.php(92): TYPO3\CMS\Core\Core\Bootstrap::createConfigurationManager() #1 /var/www/nan-minisites/public/index.php(20): TYPO3\CMS\Core\Core\Bootstrap::init(Object(Composer\Autoload\ClassLoader)) #2 /var/www/nan-minisites/public/index.php(21): {closure}() #3 {main} thrown in /var/www/nan-minisites/public/typo3/sysext/core/Classes/Core/Bootstrap.php on line 303