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Expo app not appearing on Android emulator

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I'm a beginner trying to learn how to develop mobile apps and was following this tutorial. I downloaded the "basic-chat" package, made a new folder, did expo init, then copied over the files from the "basic-chat" package to the new expo directory. Then, I did npm start and chose "run on android/emulator". The app then popped up on my Android Studio Emulator. However, the screen is blank, even after I added all the code in the tutorial. I saved my code, closed the server, then restarted but the screen remained blank. Did I configure wrong?


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