Also having this issue but don't quite understand the solution posted by zmullet (3 years ago). I'm just not that into the complexities of server accounts. I'm sure they're obvious when you know how.
I interpreted the solution as needing to add NT AUTHORITY\LOCAL SERVICE as a user in SharePoint (Site Settings -> People and Groups -> ). That's how I interpreted it but I guess that's not what is meant because it didn't work!
I really need to get this application working to undo some otherwise irreversible column adds to content types.