n two days I´ve been struggling to remove a sharepoint app/addin. I´m unsure what really happened. May be a update failed, and put the app in some corrupted state. I don’t know. But the error I kept getting was:“Another job exists for this app instance. Please retry after that job is done.”
This is the step I took to resolve it.
1. The AppMng.svc service was not available. (tried to register a new app with _layouts/15/AppRegNew.aspx and get an error about that service)That in turn was because the Search Host Controller Service was stuck on starting. I resolved that one by running the script from this blog: https://mwiedemeyer.de/blog/post/Search-Host-Controller-Service-in-Starting-state
2. The metadata service was not working properly. There was one app-pool turned off in IIS, which I started.
3. I then renamed and changed the url of the site (_layouts/15/prjsetng.aspx) which hold the installed app.
Now I was able to uninstall the app from the GUI.