A solution: Rebuild the app extension target from scratch in Xcode. Someone posted on the stackoverflow.com site that they had solved this by deleting the widget and recreating it with the current version of Xcode. After carefully documenting all the settings I had to make my Widget extension work in an earlier release, I deleted the target and recreated it in Xcode. Took way too long to configure all the details, but it works again as a widget and is accepted by AppStoreConnect upon upload with Transporter. What is a better solution?

App receipt generation is broken. I'm getting this message on macOS Monterey 12.3.1 with Xcode 13.3.1. What can be done? “My App” is damaged and can’t be opened. Delete “My App” and download it again from the App Store.

Deleting the ModuleCache.noindex at /Users/myusername/Library/Developer/Xcode/DerivedData/ModuleCache.noindex seems to fix this problem.

I changed the class hierarchy in Xcode by reassigning the super class of several classes to a different superclass. I also just now deleted ModuleCache.noindex at  /Users/myusername/Library/Developer/Xcode/DerivedData/ModuleCache.noindex Maybe that solved it? The symbols now appear correctly in Xcode's Symbol navigator.

Same basic problem here: App launch displays "MyApp" is damaged and can't be opened... and also Error Domain=com.apple.commerce.client Code=500 in the Console on Big Sur. On the other hand, when launching the same test build on older macOS systems such as High Sierra and El Capitan, the app downloads a receipt with the proper version number and the app verifies the receipt successfully.

App Store Connect Sales and Trends page does not load on macOS Big Sur 11.5.1 with Safari 14.1.2. Only top and bottom App Store Connect bars partially appear. Same problem for a couple weeks now. Safari source code debugger Console view has this: "SyntaxError: Unexpected end of script (anonymous function) main.4ebf7eb1.js:2"