Thank you @hugo! That’s exactly the problem. Daniel Jalkut is a master bug finder/fixer, I subscribe to his blog but I didn’t remember that post from 4 years ago (and I have also met him and correspond with him sometimes, he has directly helped fix a couple of Panorama bugs in the past).
Until b26, Panorama was using the 10.12 SDK so it didn’t require the change described in Daniel’s post. So b25 and earlier worked fine, and any old permissions that were already granted continued to work with b26. So that’s why it’s working for JamesCook and others – he had already set this up with an earlier beta release.
However, now with b26 it’s not possible to add NEW permissions to control other apps. So that is the problem that Jeff and others have run into. I have both duplicated this on my computer, and implemented and verified the fix. So this fix will be in b27.
In the meantime, you could temporarily install b25, run the script to add the permission (or permissions) to the system, then go back to b26.