unity unet

If I use unet in the windows editor it works all fine. But if I play the same game on an android device than I get the error: "Failed to read the ID for the match maker, please set the Cloud Project ID string in the Player Settings"
If I want to enable the matchmaker.
Is this normal or how can I fix it.
Or can I manually set the id for the match maker within a script.
(I set the Cloud Project ID already )
Thanks in advance.

 

Problem Solved I to remove unity and reinstall it again.