using react-navigation shows not a react component - reactjs

Question

I am trying to navigate between the screens. I installed npm react-navigation for this purpose. I am trying to go back from my AutoCompActivity page to app.js page. I have the following code on my AutoCompActivity page:
import HomeActivity from '../App'
class AutocompActivity extends Component {
constructor(props) {
super(props);
this.state = {
// Default Value of this State.
Loading_Activity_Indicator: true,
text:'',
selected_topic_id: -1,
}
this.arrayholder=[];
}
OpenHomePageFunction = () =>
{
this.props.navigation.navigate('Home');
}
and finally, I have this in my code:
export default MyNewProject= StackNavigator(
{
Home: {screen:HomeActivity}
}
I am getting the below error:
My AutoCompActivity.js resides inside a folder called Module, module reside inside the root folder' and app.js resides into the root folder of application.
Below is my App.js code:
import React, { Component } from 'react';
import { AppRegistry, StyleSheet, Text, View, Button, Image, TouchableOpacity,Platform } from 'react-native';
import { StackNavigator } from 'react-navigation';
import MissionActivity from './Modules/MissionActivity' ;
import AutoCompActivity from './Modules/AutoCompActivity' ;
import SearchServices from './Modules/SearchServices';
class MainActivity extends Component {
constructor(){
super();
this.state={
isVisible : true,
}
}
Hide_Splash_Screen=()=>{
this.setState({
isVisible : false
});
}
componentDidMount(){
var that = this;
setTimeout(function(){
that.Hide_Splash_Screen();
}, 5000);
}
static navigationOptions = {
title: '',
};
OpenSecondActivityFunction = () =>
{
this.props.navigation.navigate('Mission');
}
OpenThirdActivityFunction = () =>
{
this.props.navigation.navigate('autoComp');
}
OpenSearchSer = () =>
{
this.props.navigation.navigate('SearchSer');
}
render()
{
let Splash_Screen = (
<View style={styles.SplashScreen_RootView}>
<View style={styles.SplashScreen_ChildView}>
{/* Put all your components Image and Text here inside Child view which you want to show in Splash Screen. */}
<Image source={require('./Resources/CAC.png')}
style={{width:'100%', height: '100%', resizeMode: 'contain'}} />
</View>
<TouchableOpacity
activeOpacity = { 0.5 }
style={styles.TouchableOpacity_Style}
onPress={this.Hide_Splash_Screen} >
<Image source={{uri: 'https://reactnativecode.com/wp-content/uploads/2018/01/close_button.png'}}
style={{width:25, height: 25}} />
</TouchableOpacity>
</View> )
return(
<View style = { styles.MainContainer }>
<View style={styles.toolbar}>
<Image
resizeMode='contain'
style={styles.toolbarTitle}
source={require('./Resources/LogoWithDesc.jpg')} />
</View>
<View>
<Image
style={styles.title}
source={require('./Resources/Pot.png')} />
</View>
<View style={styles.searchButton}>
<Button onPress = { this.OpenSecondActivityFunction } title = 'Mission'/>
</View>
<View style={styles.searchButton}>
<Button onPress = { this.OpenThirdActivityFunction } title = 'Available Services'/>
</View>
{
(this.state.isVisible === true) ? Splash_Screen : null
}
</View>
);
}
}
export default ActivityProject = StackNavigator(
{
First: { screen: MainActivity, navigationOptions:{header:null} },
Mission: { screen: MissionActivity },
SearchSer: { screen: SearchServices },
autoComp:{screen: }
});