linking against a dylib which is not safe for use in application extensions

I am getting a build time warning which says: "linking against a dylib which is not safe for use in application extensions" in my intent app extension when I include my custom framework. I have eliminated almost all code in my custom framework.

Here is the code. Just one class:

import Foundation

public class Widget: NSObject {
    
    public var one: Int = 1
    
}

In the Build Phases section of the framework target, I set Copy Files destination as Framework like documentation instructs in App Extension Programming Guide: Handling Common Scenarios: Using an Embedded Framework to Share Code: 'When configuring your Xcode project, you must choose “Frameworks” as the destination for your embedded framework in the Copy Files build phase.'

Anyone have any experience with this problem?