Fatal error: Uncaught Symfony\Component\Filesystem\Exception\IOException: Unable to write to the "/var/www/app/cache/prod" directory. in /var/www/vendor/symfony/symfony/src/Symfony/Component/Filesystem/Filesystem.php:681 Stack trace: #0 /var/www/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCache.php(124): Symfony\Component\Filesystem\Filesystem->dumpFile('/var/www/app/ca...', '<?php\n\nuse Symf...') #1 /var/www/vendor/symfony/symfony/src/Symfony/Component/Routing/Router.php(301): Symfony\Component\Config\ResourceCheckerConfigCache->write('<?php\n\nuse Symf...', Array) #2 /var/www/vendor/symfony/symfony/src/Symfony/Component/Config/ResourceCheckerConfigCacheFactory.php(43): Symfony\Component\Routing\Router->Symfony\Component\Routing\{closure}(Object(Symfony\Component\Config\ResourceCheckerConfigCache)) #3 /var/www/vendor/symfony/symfony/src/Symfony/Component/Routing/Router.php(302): Symfony\Component\Config\ResourceCheckerConfigCacheFactory->cache('/var/www/app/ca...', Object(Closure)) #4 /var/w in /var/www/vendor/twig/twig/lib/Twig/Cache/Filesystem.php on line 55