React Native "undefined is not an Object"

Code:

import { ImageBackground,StyleSheet } from 'react-native';function WelcomeScreen(props) {    return (<ImageBackground        style={styles.background}         source={require("../assets/background.jpg")}></ImageBackground>    );  }const styles = StyleSheet.create({    background:{        flex: 1    }});export default WelcomeScreen;

Output:

Error message from android phone

Any ideas. I have been stuck for a few hours now, please help