Fatal error: Uncaught Error: Class 'Netzmacht\Contao\Toolkit\Component\ContentElement\AbstractContentElement' not found in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/Component/ContentElement/AbstractTabElement.php:37 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/Component/ContentElement/AbstractTabElement.php on line 37