What steps will reproduce the problem?
1. Create new Weakaura
2. Set destination unit to anything
3. No profit :-(
What is the expected output? What do you see instead?
I would expect the trigger to fire, but as soon as you add destination unit to the trigger, nothing happens.
What version of the product are you using?
latest stable, and as of today r292 ( both not working )
Do you have an error log of what happened?
Please provide any additional information below.