[MlMt] BusyCal bundle not working

[Sam Hathaway]

When I select Commands > BusyCal > Create Event…, nothing happens.

I’m running MailMate r5798 and BusyCal 3.12.6.1 on macOS 11.3.1. This 
might have started when I upgraded to Big Sur.

I could’ve sworn I saw this come across the mailing list a few months 
ago, but I can’t find it in my archive so here we go. Maybe it had 
something to do with permissions?

Has anyone run into this? Any solutions?
-sam