I've been upgrading my WebWork installation from a 6 year-old system currently running 2.12 to 2.17 running on the Ubuntu 22.04 virtual image. (See my previous post.) I'm just about done (I hope) but I've encountered a strange authentication error on the new system: Every time I move to a new page that requires authentication, I'm asked to re-authenticate. I'm not seeing anything in the web server logs, or in webwork2/log, so I don't know where else to look.
The only thing I can think to mention (since it's been problematic with authentication using other software) is that I'm running the webwork server via an apache reverse proxy.