Fatal error: Uncaught Error: Class 'ContaoBootstrap\Tab\View\Tab\Item\NavItem' not found in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/View/Tab/Item/Dropdown.php:23 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/View/Tab/Item/Dropdown.php on line 23