Just to make sure I'm following, @DTS Engineer, are you saying that the Mac itself has to be running macOS 26 or just a Mac with Apple Intelligence enabled? I'm running macOS Sequoia (M4 with Apple Intelligence enabled) and using Xcode 26 with an iOS 26 iPhone 16 in the simulator and it's giving me the same error ("There are no underlying assets..."). Just curious if the problem is that I have to run it on a real iOS 26 device or if I have to be running macOS 26 or if there's another problem. Thanks!

I'm running into the same issue and I haven't found a good workaround — other than removing the NavigationView, which requires a lot of additional work...