Just got this while upgrading Discourse:
The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.
Detailed information about the error was logged, and an automatic notification generated. We’ll take a look at it.
No further action is necessary. However, if the error condition persists, you can provide additional detail, including steps to reproduce the error, by posting a discussion topic in the site’s feedback category.
What notification was generated? I haven’t received any email.
The advice to post a discussion topic doesn’t make sense - the forum is down.
It would be useful to list where the error information was logged.
I couldn’t tell what broke, so I rebooted the server. Now I get 502 Bad Gateway.