Xcode 8 beta 2 - can't launch app on simulators < iOS 10

When I try to run an app on an iPad or iPhone simulator prior to version 10 (i.e. 9.3), I get the message "Application launch failed. A connection to the system service could not be established." Has anyone successfully run an app on the non-ios10 simulators?

Xcode 8 beta 2 - can't launch app on simulators &lt; iOS 10
 
 
Q