问如何修复此React本机错误：“java.lang.String无法转换为com.facebook.react.uimanager"？

EN

import React, {Component} from 'react';
import {StyleSheet, Text, View} from 'react-native';

import FetchLocation from './components/FetchLocation';

export default class App extends React.Component{
  getUserLocationHandler = () => {

  }
  render() {
    return (
      <View style={styles.container}>
        <FetchLocation onGetLocation={this.getUserLocationHandler} />
      </View>
    );
  }
}
const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF',
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
}); 

  import React from 'react';
    import { Button } from 'react-native';

    const fetchLocation = props => {
              return (
            <Button title="Get Location" onPress={props.onGetLocation}/>
              );
    };

    export default fetchLocation;