Fatal error: Uncaught RuntimeException: Unable to write in the "cache" directory (/app/var/cache/prod). in /app/vendor/symfony/http-kernel/Kernel.php:621 Stack trace: #0 /app/vendor/symfony/http-kernel/Kernel.php(515): Symfony\Component\HttpKernel\Kernel->buildContainer() #1 /app/vendor/symfony/http-kernel/Kernel.php(762): Symfony\Component\HttpKernel\Kernel->initializeContainer() #2 /app/vendor/symfony/http-kernel/Kernel.php(172): Symfony\Component\HttpKernel\Kernel->preBoot() #3 /app/public/index.php(15): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #4 {main} thrown in /app/vendor/symfony/http-kernel/Kernel.php on line 621