This happened when I pasted copied an existing line with "Wait for Expression Ring Alarm Hub-Ring mode=away (timeout=5min)" then pasted it in another spot. I proceeded to edit that condition to make a minor change and was going to remove second/duplicate/unused condition from the list of conditions--but, now, I can't click on Manage Conditions at all without triggering the error.
Not sure what else will be helpful, but here are a couple things:
I opened up the conditions and the "problem" one popped up "half edited" (prompting for the value). I then selected one, saved it, and all was good (I was then able to delete the one I didn't want).
Thanks a bunch for the quick fix.
FYI: I LOVE being able to edit local variables IN the rule--SO much better!!! Thanks for that, too!