[Unhandled promise rejection: TypeError: null is not an object (evaluating '_reactNativeMssql.default.connect')]

[anamika06194]

I am trying to connect to MSSQL server in my expo managed app but I am getting error :
[Unhandled promise rejection: TypeError: null is not an object (evaluating '_reactNativeMssql.default.connect')]

post installing (npm install --save react-native-mssql) package , i linked the dependency via following command
npx react-native link react-native-mssql

Let me know if I am missing anything.

[davidstoneham]

This plugin is not tested or developed with expo in my so that's probably the cause of the issue

[SufianWajid]

I am Having this error

Possible Unhandled Promise Rejection (id: 0):
Error: Unknown server host name 'DESKTOP-AFMCR71\SQLEXPRESS'.
Error: Unknown server host name 'DESKTOP-AFMCR71\SQLEXPRESS'.
at Object.promiseMethodWrapper [as connect] (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:2824:36)
at Start._this.database (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:703745:51)
at Pressability._performTransitionSideEffects (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:55107:15)
at Pressability._receiveSignal (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:55049:16)
at onResponderRelease (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:54956:20)
at Object.invokeGuardedCallbackProd (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:9657:16)
at invokeGuardedCallback (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:9761:37)
at invokeGuardedCallbackAndCatchFirstError (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:9765:31)
at executeDispatch (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:9837:9)
at executeDispatchesInOrder (http://localhost:8081/index.bundle?platform=android&dev=true&minify=false&app=com.objectdetection&modulesOnly=false&runModule=true:9857:11)

my code is

import React, { Component } from 'react'
import { View, StyleSheet, Dimensions } from 'react-native'
import { Button, Text } from '@ui-kitten/components';
import MSSQL from 'react-native-mssql';

export default class Start extends Component {

constructor(props){
    super(props)
}
database = () => {
    const config = {
        server: 'DESKTOP-AFMCR71\\SQLEXPRESS', //ip address of the mssql database
        username: 'sa', //username to login to the database
        password: '123456', //password to login to the database
        database: 'Concil-Connect-Mobile', //the name of the database to connect to
        // port: 1234, //OPTIONAL, port of the database on the server
        // timeout: 5, //OPTIONAL, login timeout for the server
    }
    debugger;
    const connected =  MSSQL.connect(config);

    console.log(connected);
    
}


// goToHome = () => {
//     console.log("object")
//     this.props.navigation.navigate('Home')
// }
render() {
    return (
        <View style={styles.container}>
            <Text style={styles.text}> Image recognition </Text>
            <Button 
            style={styles.button}
            onPress={this.database}
            >
                    START
            </Button>

        </View>
    )
}

}

const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: 'white',
justifyContent: 'center',
alignItems: 'center'
},
button: {
backgroundColor: "#05676D",
borderColor: '#05676D',
width: Dimensions.get('screen').width/1.5,
borderRadius: 10,
marginTop: 10
},
text: {
fontSize: 17,
marginBottom: 20,
color: 'white',
}
})