(Asked on Matrix a few times; no response. @grin:grin.hu if you'd ping me.)

Fresh install, with nginx frontend, config based on the ansible one. First time start: ui connects but gives an extremely non-descript "Error! There was an error on the server. Try refreshing your browser. If that doesn't work, come back at a later time. If the problem persists, you can seek help in the Lemmy support community or Lemmy Matrix room."

There is no error in browser console, no error on lemmy_server console, no error on UI console. No 404, websocket gives 101, ... everything looks good except it doesn't work.

I'm out of ideas.