Could not connect to lockdownd. Exiting.: Undefined error: 0

Hi,
I am getting error while starting ios-webkit-debug-proxy as:

Could not connect to lockdownd. Exiting.: Undefined error: 0
.
.
Unable to attach Device UDID inspector

I have following configuration:
MAC OS X El Capitan v10.11.5
Xcode 8 beta
iTunes 12.4.1
iPhone 6+ iOS 10.0 beta

It is working fine for other iOS versions below 10.0 beta.

Need help.

This issue began for me (albeit running ideviceinstaller) when I updated to El Capitan 10.11.6 yesterday, although it may be related to the Xcode 8 beta I installed. Running ideviceinstaller as sudo works, so I’d bet it is due to a security fix.

@MichaelGallacher It is still not working for me. My system config: OS X El Captain. I am trying to push an app on to an iPad with iOS 10 beta 7