Storyboard broken after updating Xcode to version 10.3 (10G8) & app no longer is running
I restarted my mac, the problem solved.
Running sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
from terminal solved my problem.
I restarted my mac, the problem solved.
Running sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
from terminal solved my problem.