Did something change is 3.0.3, as none of the scripts to transfer a Group to (Things, Reminders, OmniFocus) as a reminder work anymore i.e. if I select a group and run the script, I received the message “Please select a document or group, then try again.”, and I validated that thisSelection variable is indeed empty.
However if a select a document within a Group, the scripts are still working…
No, nothing has changed in this regard.
I am surmising you are making a selection in the Navigate sidebar, which doesn’t report selections. Try selecting the group in the item list and see if the issue recurs.