How do I diagnose and fix 'A signed resource has been added, modified, or deleted' in Swift/Xcode?

The error message 'A signed resource has been added, modified, or deleted' often appears in Xcode when you are trying to run or archive your app. This typically indicates that there is an issue with the code signing process, where files that need to be included in the application bundle have been altered or some required files are missing. Below are some steps to diagnose and resolve this error.

Diagnosis and Fixing Steps

1. Clean the Build Folder: Go to the menu bar and select Product > Clean Build Folder to clear out any old build artifacts.
2. Check Your Code Signing Settings: Ensure that your code signing identity and provisioning profiles are properly set.
   Go to your project settings, select the Signing & Capabilities tab, and verify the settings.
3. Review Your Project Files: Ensure that all necessary files are in the bundle and that none have been accidentally modified or deleted.
4. Delete Derived Data: Open Xcode Preferences, navigate to the 'Locations' tab, and click on the arrow next to the Derived Data path. Delete the folder associated with your project.
5. Check for Updates: Ensure that Xcode and macOS are updated to the latest version as updates can address bugs and issues related to code signing.