When I update Xcode to Version 10 GM, build success, but Simulator can\'t work! with error:
The operation couldn’t be completed. (DVTCoreSimulatorAdditio
I had the same issue. Not 1 simulator worked and the UIStoryboard
was not rendering any graphics. The solution was to restart my mac. Not just Xcode
but your Mac (laptop, mac mini, whatever you might be using)
run xcrun simctl erase all
in Terminal. It should solve the issue.
i think its a bug from Apple.