While I was working in a playground doing an online iOS development course, spontaneously, the window threw a warning above the text editor saying,
"Failed to launch process. Failed to attach to stub for playground execution: error: unable to attach."
This makes the continuous compiler not work whatsoever, even after closing all of my other playgrounds and starting fresh, it defaults to this error immediately upon launch. There's no output in the Debug area either, so I don't have anything more than this warning to go off of. I've tried uninstalling and re-installing XCode, no change. Has anyone else experienced this? What else could I try to do to fix this?
I'm working with XCode 8.2.1, on a late-2014 MBP.
Interestingly enough, running Projects doesn't give the same issue, and I can run app simulations just fine. It seems like only playgrounds are affected.