I’m having the exact same problem, also having tried to bring a fully functional android tested app into iOS - given up and started a blank project. I’ve even deleted the app project and created a new blank one but can’t get it to run.
I can’t quite understand how this is not a react-native issue? why is it closed? is there a solution?
As per the recommendations, I can’t unlink components because the project that referenced anything has been deleted.
I don’t think downgrading react-native is a very good solution - especially if it is not a react-native issue! but i’ve tried all the other suggestions including:
react-native start --reset-cache
npm cache verify