Sphere to cube not working all of a sudden

I've reloaded krpano twice and getting same issue. Sphere to cube droplet is not working. Drag an image onto is and nothing happens. Any ideas?

Confirmed it on three Macs under Mojave and Catalina. !.20.7 does not work (sphere to cube is non-responsive, no errors, nothing)

1.20.5 was working just fine. Reverted back and it still is on all machines not running 1.20.7.

Something wrong with OS fix?