[Solved] Admin-upgrade page not showing up

installation
3

@cpradio, thanks for your answer.

The instance is installed on the domain w|w|w.doc|u|ss.o|r|g (remove the pipes).

Here is the plugin list:

hooks:
  after_code:
    - exec:
        cd: $home/plugins
        cmd:
          - git clone https://github.com/discourse/docker_manager.git

But I have to say I’ve installed the Discourse Spoiler Alert plugin earlier, then uninstalled it. I found no doc about uninstalling a plugin, so I simply removed it from the yml file then ran ./launcher rebuild app again.