3 empty categories that persist after deletion

What I did: After a migration from cloud to dropbox back to cloud (bad idea now I know that), and moving some things around, eventually, I could not remove 3 categories that seem clearly broken and cannot be removed.

What I have tried: When I right click on the name, it provides me a pop-up menu with option to delete but does nothing upon clicking delete. When I click the 3 dots menu on the right, a 10px height, 300px width arrow-left white menu rounded on the right pops up with no contents.

Any ideas how to remove these?

Is this on iOS/iPadOS or macOS?

It displays on iPad, iPhone, and Desktop.

Does it help if you (on your Mac):

  • quit Agenda
  • in Go to Folder under the Go menu in Finder, paste:
    ~/Library/Group Containers/WRBK2Z2EG7.group.com.momenta.agenda.macos/Release/Application/
  • make a backup copy of the DerivedInfo folder, then delete it
  • start Agenda

Do things works as they should after that?