Fatal error: Uncaught Error: Class 'ContaoBootstrap\Tab\Component\ContentElement\AbstractTabElement' not found in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/Component/ContentElement/TabSeparatorElement.php:21 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/Component/ContentElement/TabSeparatorElement.php on line 21