Expo Image Picker data url cannot be uploaded with error "String does not match format 'base64'"

[TianrenWang]

• Operating System version: iOS simulator 15.0
• Browser version: _____
• Firebase SDK version: ^9.9.2
• Firebase Product: storage

Steps to reproduce:

Use Expo Image Picker to get the base64 encoding of a starter photo in the photo library. Convert the base64 encoding into a data uri by prepending it with "data:image/jpeg;base64," and enter it into uploadString as format data_url. It will return the following error: Firebase Storage: String does not match format 'base64': Invalid character found (storage/invalid-format)

import * as ImagePicker from "expo-image-picker";
import { getStorage, ref, uploadString } from "firebase/storage";

const storage = getStorage();
.
.
.
ImagePicker.launchImageLibraryAsync({
  mediaTypes: ImagePicker.MediaTypeOptions.All,
  allowsEditing: true,
  aspect: [4, 3],
  quality: 1,
  base64: true,
}).then((result) => {
  if (result.uri) {
    const imageRef = ref(storage, `/photoURLs/randomID`);
    return uploadString(
      imageRef,
      "data:image/jpeg;base64," + result.base64,
      "data_url"
    );
  }
  return Promise.resolve();
});