I have successfully initialized a react native project using expo coo and I get a webpage rendering with the ‘…..edit your app.js….’. When I add other screens and modify app.he as required I get a blank screen. No error on terminal. The web bundling notification is in green text. What could be the issue?

I created other screens and edited app.js to import those screens. When I invoked npx expo start –clear, I get a blank page. I expected a start screen with login and registration buttons.