"Not that it should matter, but can you confirm that you are on the "master" branch of webwork2 and pg, which is presently version 2.15?" - sorry not 100% sure what you mean ? or how to check
So, today I terminated the AWS image, deleted everything and started fresh, following https://webwork.maa.org/wiki/Installing_from_WW2.15_Ubuntu20.04_Server_Virtual_Machine_Image
Same issue persists, the server is, http://ec2-3-133-102-106.us-east-2.compute.amazonaws.com
I'm happy to give anyone ssh access, as it is just a test case with nothing sensitive, let me know, since I am well out of my dept in terms of server stuff. Given that I have followed the instructions and taken the official image I cannot see how I have done anything wrong. I am based in Ireland, so I had to change my AWS default from here to Ohio, if that makes any difference, my security settings are SSH and HTTP added, with 0.0.0.0/0 as the IP, I have tried this with 'anywhere' too and it makes no difference. As you can see the apache page works fine, but webwork nope, all the settings are default so I am happy to let anyone play and see if they can shed some light.