Fatal error: Uncaught UnexpectedValueException: The stream or file "/app/var/log/prod.deprecations.log" could not be opened: failed to open stream: Permission denied in /app/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php:107 Stack trace: #0 /app/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(39): Monolog\Handler\StreamHandler->write(Array) #1 /app/vendor/monolog/monolog/src/Monolog/Handler/FilterHandler.php(121): Monolog\Handler\AbstractProcessingHandler->handle(Array) #2 /app/vendor/monolog/monolog/src/Monolog/Logger.php(344): Monolog\Handler\FilterHandler->handle(Array) #3 /app/vendor/monolog/monolog/src/Monolog/Logger.php(609): Monolog\Logger->addRecord(200, 'User Deprecated...', Array) #4 /app/vendor/symfony/debug/ErrorHandler.php(501): Monolog\Logger->log(200, 'User Deprecated...', Array) #5 [internal function]: Symfony\Component\Debug\ErrorHandler->handleError(16384, 'The default val...', '/app/vendor/sym...', 92, Array) #6 /app/vendor/symfony/http-foundation/Cookie.php(92): t in /app/vendor/monolog/monolog/src/Monolog/Handler/StreamHandler.php on line 107