react-native-fetch-blob is blocking firebase calls n react native app

I have a react native app that uses Firebase, firestore. for uploading images i am using "react-native-fetch-blob" to create a Blob.

in the js file that I use to upload the file, my code look like this:

const Blob = RNFetchBlob.polyfill.Blob
const fs = RNFetchBlob.fs
window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest
window.Blob = Blob

**

window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest

**

because of this window.XMLHttpRequest my app is blocked and not getting any response from firebase(not catch / nothing => just passing thrue the code).

if i removed this line i can read/write to the firestore, bat I can't upload an image.

is there anything i can do for uploading images and keep writing to firestore?

Heare is my page:

import ImagePicker from 'react-native-image-crop-picker';
import RNFetchBlob from 'react-native-fetch-blob'
import firebase from 'firebase';

const Blob = RNFetchBlob.polyfill.Blob
const fs = RNFetchBlob.fs
window.XMLHttpRequest = RNFetchBlob.polyfill.XMLHttpRequest
window.Blob = Blob

export const choozFile = (isSmalImg) => {
    let options = {
        width: isSmalImg ? 100 : 690,
        height: isSmalImg ? 100 : 390,
        cropping: true,
        mediaType: 'photo'
    };
    return new Promise((resolve, reject) => {
        ImagePicker.openPicker(options).then(response => {
            let source = { uri: response.path };
            resolve({ avatarSource: source, isProfileImg: isSmalImg })
        })
    });
}

export const addReportToFirebase = (obj = {}, uri, isProfile, mime = 'application/octet-stream') => {
    obj["uId"] = "JtXNfy34BNRfCoRO6luwhIJke0l2";
    const storage = firebase.storage();
    const db = firebase.firestore();
    const uploadUri = uri;
    const sessionId = new Date().getTime();
    let uploadBlob = null;

    const imageRef = storage.ref(`images${isProfile ? '/profile' : ''}`).child(`${sessionId}`)

    fs.readFile(uploadUri, 'base64')
        .then((data) => {
            return Blob.build(data, { type: `${mime};BASE64` })
        })
        .then((blob) => {
            uploadBlob = blob
            return imageRef.put(blob, { contentType: mime })
        })
        .then(() => {
            uploadBlob.close()
             imageRef.getDownloadURL().then((url)=>{
                obj['image'] = url;
                db.collection("reports").add(obj).then(() => {
                    console.log("Document successfully written!");
                }).catch((err) => {
                    console.error("Error writing document: ", err);                    
                });
            })
        })
        .catch((error) => {
            console.log('upload Image error: ', error)
        })
};