I am unable to add a Yes/No field to the Activity Table. I get this error.
I was able to successfully add a text field and a drop-down field. Seems to be isolated to yes no fields.
Hey Mahlon,
I was able to replicate this error. I have created a ticket for our development team - I'll keep you posted in any updates I receive on this thread.
-- Mortaza
Incidentally, I just discovered it had saved the field and I can actually use it on the screen.
Update: Oct 6, 2015. This issue still exists after Oct 5th release.