can't build projects after update

Question

After automatically updating to 10.2.1 Xcode now can't build anything. and logging this error

Failed to find or create execution context for description ' System content for IBCocoaTouchFramework-ElevenAndLater scaleFactor=2x'. These intermediate objects were non-nil: ( "IBSimDeviceTypeiPad2x

Showcasing that it's in .storyboard files

I deleted derived data, and tried to use legacy build system, with no luck

Answer 1

sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

works for me!