Fatal error: Uncaught RuntimeException: Unable to write in the cache directory (/var/www/link_shortener/var/cache/prod/twig/0b). in /var/www/link_shortener/vendor/twig/twig/src/Cache/FilesystemCache.php:61 Stack trace: #0 /var/www/link_shortener/vendor/twig/twig/src/Environment.php(409): Twig\Cache\FilesystemCache->write('/var/www/link_s...', '<?php\n\nuse Twig...') #1 /var/www/link_shortener/vendor/twig/twig/src/Environment.php(381): Twig\Environment->loadClass('__TwigTemplate_...', 'security/login....', NULL) #2 /var/www/link_shortener/vendor/twig/twig/src/Environment.php(359): Twig\Environment->loadTemplate('security/login....') #3 /var/www/link_shortener/vendor/twig/twig/src/Environment.php(318): Twig\Environment->load('security/login....') #4 /var/www/link_shortener/vendor/symfony/framework-bundle/Controller/ControllerTrait.php(233): Twig\Environment->render('security/login....', Array) #5 /var/www/link_shortener/src/Controller/SecurityController.php(28): Symfony\Bundle\FrameworkBundle\Controller\AbstractController-> in /var/www/link_shortener/vendor/twig/twig/src/Cache/FilesystemCache.php on line 61