After a KM update to 11.1, many shortcuts were not working.
e.g. Insert Text by Typing, Move Mouse to, Activate, etc.
After some investigation (thanks to this forum), I looked at the application contents and saw that the Keyboard Maestro Engine.app is unavailable (Ø over the icon).
Restarted the computer (macOS Big Sur 11.7.10), no change
Deleted and reinstalled KM v11.1, no change
Deleted and reinstalled KM v11.1 & rebooted, no change
It's probably something I should know, but have missed. Any help would be appreciated.