I’m using the method proposed by Nigel here to have Dialog Toolkit dialogs display with scripts run from the Scripts Menu. Basically, the dialog code is put into a handler in an applet, and the applet is then run by the Scripts Menu script. It has worked well for some time.
I set these applets to run as agents - they don’t show a menu bar or a Dock icon.
With one of them I missed doing that, so a few days ago I added the relevant key to its Info.plist. And it stopped displaying the dialog. It runs, but no dialog. Removing the key did not make it work again. When I run the calling script from Script Editor it works as intended.
Any ideas to get this going again? Some setting in System Preferences? I fiddled with some of them, without success. I’m still on 10.15.