Since upgrading to Catalina my macros that work relative to a screen image no longer work also. The following is an example action:

I have tried resetting the "Accessibility" permissions for both Keyboard Maestro and Keyboard Maestro Engine as suggested here (e.g. removing and readding the checkboxes, and also completely removing the entries via '-' and readding), all without success. The issue appears to be a lack of permission to the screen recorder based on the following log entry when the macro with the above action is run:
2020-01-02 12:22:53 HScreenArea::CaptureCGImage failed to capture front window
2020-01-02 12:22:53 Move or Click Mouse no unique image found.
A view of my Privacy: Screen Recording configuration attached shows that it is empty, and therefore no option to enable access to Keyboard Maestro. I have no idea how to enable this manually. Should Keyboard Maestro be showing, and enabled here, like it is in the "Accessibility" section? If so, how is this done? If not, then can you offer any suggestions to get my macros working again under Catalina?
Many thanks for any help provided.