502 Bad Gateway

We received an invalid response from the upstream server.

Click here to report this problem to the Department of Engineering

User

If you're just visiting the site, here are the steps you can take.

1. Try again in 5 minutes.
2. Contact the site owner for assistance.

Site Operator

If you're the operator of this site, here are the steps you can take.

1. This code generally means our gateway received CONNECTION REFUSED while trying to communicate with your application, which means it's not listening on the port.
2. We could be listening on another port than the one you're using, make sure you're using the port given to you by Engineering.
3. If none of these solved your issue, please contact the Department of Engineering at engineering@libraryofcode.org