FBSOpenApplicationErrorDomain 3 error when trying to run the clock set application on a physical device

Question

I get the same problem that is described in this question . However, this issue concerns the iOS simulator, not the physical device.

I do not use the iOS simulator. I host on iPhone + Apple Watch.

If I try to run it on a simulator, it will work fine.

In the step "Running WatchKit App on Apple Watch" I get the following error:

Error starting 'WatchKit Extension'
The operation could not be completed. (Error FBSOpenApplicationErrorDomain 3.)

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What I tried:

I tried restarting the iOS simulator and then running it on the device (not sure how this would help), but I still have the same error message.

I tried to go into iOS settings> General> Device Management and to make sure the application is “Verified”.

Restarting Xcode didn't help either.

Uninstalling the application and reinstalling it does not help.

I tried running the iOS application once to make sure there are no permissions in this area.

Xcode: 7.2
iPhone: iOS 9.2
Apple Watch: watchOS 2.1

Answer 1

It was an issue with permissions on the Apple Watch.

To fix it:

• Launch the application once manually (and not through Xcode).

  The following message will appear:

  Untrusted App Developer
  Do you trust the developer "..." to launch applications on your Apple Watch?
  [Trust]
  [Do not trust]

• Click Trust.

• Now you can run the application through Xcode without any problems.