Of course, after than, whatever you've just plugged into it, will most likely not work

502 Bad Gateway
504 Gateway Timeout
X-Forwarded-For

The solution is probably somewhere deep in the bowels of whatever you're trying to make work

It will look obvious once you've figured out, that's why it wasn't mentioned next to the bunch of instruction you pasted into your console to install the thing

Just another day walking in the forest of papercuts