Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Extension\Extension' not found in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/DependencyInjection/ContaoBootstrapTabExtension.php:28 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao-bootstrap/tab/src/DependencyInjection/ContaoBootstrapTabExtension.php on line 28