That did it! I... never would've guessed that, from the error.

Hey, greay, did you ever find a solution for your problem? I'm having a similar problem with an app I'm working on where I have a one-and-done binding that functions as expected the first time, but then doesn't fire again upon changes. Any guidance would be greatly appreciated. :) No, I ended up moving completely away from SwiftUI because I need to support older versions of macOS.

I should add/clarify that both of these apps are already for sale on the store. We are NOT trying to change anything under "App Information" – like the localizable name. We want that to stay as-is. All we're trying to do now is add localized copy for the stuff in the update: What's new, promotional text, description, etc.