Xcode 9 beta often fails with "App installation failed, An unknown error has occurred."

[boundsj]

Xcode 9 betas (at least 2 through 5) often stop with this error when working on ARKit projects when trying to install and debug on the device:

Opening this for tracking but does not seem to be specific to anything about mapbox-arkit-ios. Once it happens, it often happens for every other install/run attempt so usually simply trying again works. Often a full restart of Xcode avoids the issue for a bit but it'll inevitably come back.

[boundsj]

cc @jmkiley

[ceekay1991]

unknown error -1=ffffffffffffffff

[ghost]

Try by uninstalling the app from device/simulator