We're suffering from the same problem.

I'm seeing the same crash here. Everything works fine on Xcode 16.3 with the iOS 18.4 Simulator.

This issue seems to be either compiling the app against the iOS 18 SDK (and running it on iPadOS 26) or compiling against the iOS 26 SDK and having UIDesignRequiresCompatibility set to true in Info.plist. In both cases, the UI is somehow broken, and the cancel button does not appear. The problem does not occur when the app is compiled against the iOS 26 SDK without the UIDesignRequiresCompatibility flag.