In my case, changing the product name seemed to help, although I'm not completely sure that was the problem as I changed a lot of things while trying to make it work. (the name was starting with a number and I removed it on debug target)
cyber_gh
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
Post
Replies
Boosts
Views
Activity
This is still happening on Mac OS Big Sur and Xcode 12.2 stable
I cannot preview any swift ui view in my application, and it was working just fine before the update.
Does anyone have any suggestions?