问如何解决项目错误:元素类型无效？

EN

{
  "main": "node_modules/expo/AppEntry.js",
  "scripts": {
    "start": "expo start",
    "android": "expo start --android",
    "ios": "expo start --ios",
    "web": "expo start --web",
    "eject": "expo eject"
  },
  "dependencies": {
    "@expo-google-fonts/montserrat": "^0.1.0",
    "@react-native-community/masked-view": "^0.1.11",
    "@react-native-community/viewpager": "^5.0.11",
    "@react-navigation/bottom-tabs": "^5.11.11",
    "@react-navigation/native": "^5.9.4",
    "@react-navigation/stack": "^5.14.5",
    "expo": "~41.0.1",
    "expo-linear-gradient": "^9.1.0",
    "expo-status-bar": "~1.0.4",
    "react": "16.13.1",
    "react-dom": "16.13.1",
    "react-native": "https://github.com/expo/react-native/archive/sdk-41.0.0.tar.gz",
    "react-native-gesture-handler": "^1.10.3",
    "react-native-reanimated": "^2.2.0",
    "react-native-safe-area-context": "^3.2.0",
    "react-native-screens": "^3.3.0",
    "react-native-web": "~0.13.12"
  },
  "devDependencies": {
    "@babel/core": "^7.9.0"
  },
  "private": true
}

import React from 'react';
import { NavigationContainer } from '@react-navigation/native';
import ChatStackNavigator from './src/navigations/Navigator';
import {
  useFonts,
  Montserrat_700Bold,
  Montserrat_600SemiBold,
  Montserrat_800ExtraBold
} from '@expo-google-fonts/montserrat';
import { AppLoading } from 'expo'


const App = () => {
  let [fontsLoaded] = useFonts({
    Montserrat_700Bold,
    Montserrat_600SemiBold,
    Montserrat_800ExtraBold
  });
  if(!fontsLoaded) {
    return <AppLoading/>
  }
  return(
    <NavigationContainer>
      <ChatStackNavigator/>
    </NavigationContainer>
  )
}
export default App;

import { AppLoading } from 'expo'

if(!fontsLoaded) {
    return <AppLoading/>
  }

import AppLoading from 'expo-app-loading';

if(!fontsLoaded) {
    return <AppLoading/>
  }