Fatal error: Uncaught Error: Interface "TYPO3\HtmlSanitizer\Behavior\AttrValueInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/html-sanitizer/src/Behavior/EmptyAttrValue.php:17 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/html-sanitizer/src/Behavior/EmptyAttrValue.php on line 17