So I have a MacOS application that was working just fine before Xcode 16. The Widgets are not working anymore.
The main application and the widgets share a file in a common App Group.
The widget app now get a permission error when accessing the file.
Also, the Widget Kit simulator keeps crashing.
I also try to start a new project in Xcode, add a target with a Widget extension with an App Intent and run it, and it also crashes.
Sometimes, it doesn't crash but just display the error: "Failed to load widget. The operation couldn't be completed. (WidgetKit_Simulator.WidgetDocument.Error error 2.).
Edited to attach WidgetKit error log
widgetKitError.txt
Wonderlink
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