When adding a language to a new leaderboard to an app in App Store Connect, the view isn't responsive. It's impossible to enter anything in the text fields or choose from the dropdown menus.

When I run my app from Xcode 12.0 on an iPhone 8 (iOS 14.0) I get the error: iPhone is not available. Please reconnect the device. I've tried restarting Xcode and unpairing the iPhone from Xcode, but nothing seems to work. The app works fine on the simulator.