I've deployed a template named judge0 and everything went smooth when deploying, but when trying to use the server and hit the /submissions endpoint I always get a 500 error, other endpoints, like /docs and /about, work as expected (they don't use redis), but this mentioned shows in logs:
Redis::CannotConnectError (Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED)):
although all env variables are set on startup and redis password is filled.

Any idea how I can set it up?