Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Html\HtmlParser" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Html/RteHtmlParser.php:45 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Html/RteHtmlParser.php on line 45