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