Application could not be verified error when building app for iPhone device
My problem was actually that I already installed the app via a testflight on my phone, after removing the app it worked!
I got it resolved by deleting already installed build from phone and then reinstall the build.
From this thread on ADC:
get-task-allow, when signed into an application, allows other processes (like the debugger) to attach to your app. Distribution profiles require that this value be turned off, while development profiles require this value to be turned on (otherwise Xcode would never be able to launch and attach to your app).