Swift Playground and Simulator Error (ipc/mig) server died, Unable to boot the iOS Simulator

Question

When I try to do anything in Playground, this pops up before I even finish typing a word.

Error running playground. Failed to launch iOS stub for playground: The ope

Answer 1

This error popped up for me when I closed the simulator before Xcode finished attaching my application to it. Opening the simulator and running the app again solved this problem.