The file "playground.xcworkspace" doesn't exist

I have the same issue: can't create an empty playground file wither from the File > New File menu or by first creating an Xcode workspace and trying to create a new file from the '+' button inside the workspace. I get the same message: The file "playground.xcworkspace" doesn't exist.

Version is: Xcode 8, Version 8.0 beta (8S128d), macOS Sierra 10.12 Beta (16A201w)

Found that the unexpected happens:

I get a new directory structure, which is not what I thought should happen (I just want the file!):

newFolder/:

ate/:

iOS/:

newFile.playground

Checking release notes for new ideas. Stumped.

BTW: This is radar

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