React Native Expo app : can not POST image to Imgur with Axios

Question

I would like to upload a picture from Android Virtual Device to Imgur

I already saw this link.

With ImagePicker.launchImageLibraryAsync() I get the file :

export async function pickImage() {
    let result = await ImagePicker.launchImageLibraryAsync({
        mediaTypes: ImagePicker.MediaTypeOptions.All,
        allowsEditing: false,
        aspect: [4, 3],
        quality: 0,
        // base64: true
    });

    if (!result.cancelled) {
        return result.uri
    }
}

Now, axios instance creation :

const instance = axios.create({
    baseURL: 'https://api.imgur.com/3/',
});

Now, axios POST :

async function postImage(authState, imageUri) {


    //let imageData = new FormData();
    //imageData.append('file', {uri: imageUri});

    await instance({
        method: 'post',
        url: 'upload/',
        data: {
            image: imageUri
        },
        headers: {
            'Authorization': 'Bearer ' + authState.accessToken,
            'Content-Type': 'multipart/form-data'
        },
    })
    .then((response) => {
        console.log("========== [OK] [POST] IMAGE ==========");
    })

    .catch((error) => {
        if (error.response) {
            console.log("========== [ERROR] [POST] IMAGE ==========");
            console.log(error.response.data.data.error);
        } else {
            console.log('Error', error.message);
        }
        errorObject.status = 'KO';
        return errorObject;
    });

}

I get this error :

========== [ERROR] [POST] IMAGE ==========
Invalid URL ({"image":"file:/data/user/0/host.exp.exponent/cache/ExperienceData/%2540Johndoe%252Fphoto_finder/ImagePicker/0b453d00-189d-4ccb-840a-6215fff97d38.png"})

• There is no error in URL (works with Postman)
• I tried the request with different Content-Type
• If I remove the "data" field, I get this error :

"error": "No image data was sent to the upload api"

I don't know what how to move on with this "Invalid URL". Can you help me please ? Thank you very much.