The current published version is fine, thanks for trying it! I'm working on a new release, and haven't been able to get the Apple build to work. Lots has changed since the last release, certainly on my side and I presume also on Apple's.

I've manually tested on Monterey.

Ah ok, makes sense.

I’d recommend you check out Apparency [1], which can inspect .app bundles and show you what’s up with the signing on your bundle. It looks like you include a few frameworks (which also need to be signed), so maybe you have components missing signatures/with mismatched signatures.

[1] https://mothersruin.com/software/Apparency/

This looks like it will be immensely useful! Thanks!