My issue was going back to the playground file after a while the playground was running for ever. I just clicked stop playground in the editor menu and then clicked run... it solved my issue for me.
jmhayes
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
From
Canada