Fatal error: Uncaught Error: Interface 'Helhum\ConfigLoader\Processor\Placeholder\PlaceholderInterface' not found in /var/www/typo3/vendor/helhum/config-loader/src/Processor/Placeholder/ConfigurationPlaceholder.php:17 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/helhum/config-loader/src/Processor/Placeholder/ConfigurationPlaceholder.php on line 17