Fatal error: Uncaught Error: Class 'Twig\Extension\AbstractExtension' not found in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/Twig/NelmioCSPTwigExtension.php:21 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/nelmio/security-bundle/Twig/NelmioCSPTwigExtension.php on line 21