I'm running through the "How to Create and Award Achievements via a Leaderboard" tutorial and, unfortunately, when I try to add trigger data to the achievements I am presented with an error on the bottom of the screen that persists no matter what trigger data is added. 

You cannot save this object as there are validation errors:

Other Trigger Data: This field must match the format .+ if leaderboardField matches

This stops the progression of the tutorial as it is key.

REPRO STEPS

Proceed through tutorial

1. Add Event
2. Add Leaderboard
3. Add Achievement
4. Add Trigger to Achievement

RESULT
Error message

You cannot save this object as there are validation errors:
Other Trigger Data: This field must match the format .+ if leaderboardField matches

Making it impossible to save and continue with the tutorial.

EXPECTED
Error to clear and proceed with tutorial

Any suggestions would be appreciated.  This is a pretty key component of our design.