FBSOpenApplicationErrorDomain Code=3
iOS Simulator -> Reset Contents and Settings...
Worked for me
iOS Simulator -> Reset Contents and Settings... -> Reset
Keep Your Settings
Restart simulator:
- Click on Simulator app
- Simulator > Quit Simulator or
CMD + Q - Click on xcode
- Project > Run or
CMD + R
For those using real hardware and not the simulator, I had this issue. The problem is I'd selected my individual developer account as my code signer. In doing so, I had to go to:
Settings > General > Profiles > Device Management > (my email)
and then tap the Trust (my email) to trust my individual account.
After I did this, cmd-R ran my code on my watch/phone just fine.