Xcode 8 beta 4: "Could not attach to pid : 1110" when running on physical device

Question

I made a messages extension and when I run it on the iOS simulator everything runs no problem. When I try to run it on my phone, it compiles and says running for about 5 seconds before crashing and giving me a pop down message in Xcode saying Could not attach to pid Here is a screenshot:

I am using Xcode 8 beta 4 with iOS 10. Everything runs fine in simulator this is on physical device. I have rebooted and restarted everything. I have even tried on two phones. Anyone know the solution?

Thanks

Answer 1

Okay this is a tough one. I went searching though the Xcode beta 4 release notes and found the answer in the known bugs section: