Allowed Origin field not visible

I am running the Alta Controller (version 1.1p) in Docker. I’m using Nginx Proxy Manager in front of it. When browsing to the controller, I get Bad Origin errors. According to posts on the forum, custom hostnames can be added in the controller under Settings → System → Advanced. However, the field is not visible. I can see it in the source code, so for some reason it’s just not being shown. Is there anything I am doing wrong?

Only the Controller Admin is able to modify the Allows Origins and Ports. Can you make sure you are logged in as that?