The following error occurs: nginx: host not found in upstream "ap.ghost.org"

Developer help
1

If you’re looking for help, please provide information about your environment. If you delete this template and don’t provide any information, your topic will be automatically closed.

If you aren’t running the latest version of Ghost, the first thing we’ll ask you to do is update to the latest version of Ghost.

  • What’s your URL? :
  • What version of Ghost are you using? : Ghost-CLI v1.28.1

And

  • How was Ghost installed and configured? : Using the install command via Ghost-CLI
  • What Node version, database, OS & browser are you using? : node-22.17.1 / db-mysql / os-ubuntu 22.04.5 LTS
  • What errors or information do you see in the console?
Starting A high performance web server and a reverse proxy server...
nginx: [emerg] host not found in upstream "ap.ghost.org" in /etc/nginx/sites-enabled/<site-name>-ssl.conf:24
nginx: configuration file /etc/nginx/nginx.conf test failed
nginx.service: Control process exited, code=exited, status=1/FAILURE
nginx.service: Failed with result 'exit-code'.
Failed to start A high performance web server and a reverse proxy server.
  • What steps could someone else take to reproduce the issue you’re having? : After installing Ghost via Ghost-CLI and restarting Ubuntu, I got an nginx error. I don’t know how to reproduct it.
2

Is there any reason ap.ghost.org won’t resolve for you (e.g. custom DNS provider)? This sounds like it might be related to Added activitypub path to nginx by rmgpinto · Pull Request #1963 · TryGhost/Ghost-CLI · GitHub

If not, can you try rebooting nginx - maybe it was a glitch?

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