Fatal error: Uncaught RuntimeException: Failed to write cache file "/var/www/app/app/cache/prod/classes.php". in /var/www/app/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php:239 Stack trace: #0 /var/www/app/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php(122): Symfony\Component\ClassLoader\ClassCollectionLoader::writeCacheFile('/var/www/app/ap...', '<?php \nnamespac...') #1 /var/www/app/app/bootstrap.php.cache(2573): Symfony\Component\ClassLoader\ClassCollectionLoader::load(Array, '/var/www/app/ap...', 'classes', false, false, '.php') #2 /var/www/app/app/bootstrap.php.cache(2408): Symfony\Component\HttpKernel\Kernel->doLoadClassCache('classes', '.php') #3 /var/www/app/app/bootstrap.php.cache(2442): Symfony\Component\HttpKernel\Kernel->boot() #4 /var/www/app/web/app.php(28): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #5 {main} thrown in /var/www/app/vendor/symfony/symfony/src/Symfony/Component/ClassLoader/ClassCollectionLoader.php on line 239