All the playground files in version 3.0 cannot be open, it says: The document “playground.xcworkspace” cound not be opened.
maxOS Big Sur 11.6 and XCode 13.0
Attempting to open ANY playground from the 3.0 version of the code, previously downloaded as a ZIP from GitHub, results in the following error: “Couldn’t load settings from contents.xcplayground”.
This is using Xcode 13.0 (13A233) on macOS Big Sur 11.6.
There is no problem opening playgrounds from the 2.0 version of the code.
UPDATE: I downloaded the ZIP again and things work, so not sure what happened. However, the problem persists with the playgrounds in the 02-publishers-and-subjects folder (as far as I can tell, so maybe best to try opening every playground and fix those that cannot be opened).
Same problem here, just cloned the respository and the starter playground (02-publishers-and-subjects) can’t be opened Couldn’t load settings from contents.xcplayground
Edit
Ok I got it, just ignore this folder, since does not match any chapter in the book.
Thanks for saving my time here.