Fatal error: Uncaught Symfony\Component\Debug\Exception\ClassNotFoundException: Attempted to load class "Twig_Error_Loader" from the global namespace. Did you forget a "use" statement? in /var/www/webapp/vendor/twig/twig/lib/Twig/Loader/Filesystem.php:203 Stack trace: #0 /var/www/webapp/vendor/symfony/symfony/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php(76): Twig_Loader_Filesystem->findTemplate('AppBundle::layo...') #1 /var/www/webapp/vendor/twig/twig/lib/Twig/Loader/Filesystem.php(143): Symfony\Bundle\TwigBundle\Loader\FilesystemLoader->findTemplate('AppBundle::layo...') #2 /var/www/webapp/vendor/twig/twig/lib/Twig/Environment.php(269): Twig_Loader_Filesystem->getCacheKey('AppBundle::layo...') #3 /var/www/webapp/vendor/twig/twig/lib/Twig/Environment.php(345): Twig_Environment->getTemplateClass('AppBundle::layo...') #4 /var/www/webapp/vendor/twig/twig/lib/Twig/Template.php(329): Twig_Environment->loadTemplate('AppBundle::layo...', NULL) #5 /var/www/webapp/var/cache/prod/twig/be/be79e8b2c4b6bc14d9586068e53f8ad in /var/www/webapp/vendor/twig/twig/lib/Twig/Loader/Filesystem.php on line 203