Firestore get() returns "Could not reach Cloud Firestore backend" error

[hsubox76]

[REQUIRED] Describe your environment

• Operating System version: MacOS Big Sur 11.3.1
• Browser version: Chrome, Firefox
• Firebase SDK version: 9.0.0-beta.3
• Firebase Product: firestore

Starting in beta.3, Firestore get() has a timeout error:

@firebase/firestore: Firestore (9.0.0-beta.3): Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

Sample code to reproduce (this is compat, but using standard exp functions has the same result):

import firebase from "firebase/compat/app";
import "firebase/compat/firestore";

async function main() {
  const app = firebase.initializeApp({ ... });
  const firestore = firebase.firestore();
  const response = await firestore.collection("testCollection").doc("trueDoc").get();
  console.log(response.data());
}

Firestore logs:
https://paste.googleplex.com/5208332383027200

This doesn't happen in beta.2. It may have been caused by replacing XHR with fetch in #4939.

[etiennestuder]

I've noticed the same behvior (not working with beta3, working with beta2).

[atanaskanchev]

Seconded. I have the same issue with v9b3

[vabatta]

@etiennestuder so also beta2 has the issue?
I noticed it with beta3 and thought of downgrade.

[etiennestuder]

@vabatta works with beta2

[steinn]

I still have the same issue using the v9 beta3 and beta4 versions. I've tried both compat and exp api.

const app = initializeApp({...});

async function main() {
  const docRef = doc(getFirestore(), "Test", "test");
  const data = await getDoc(docRef);
  console.log(data.data());
}

@firebase/firestore: Firestore (9.0.0-beta.4): Could not reach Cloud Firestore backend. Backend didn't respond within 10 seconds.
This typically indicates that your device does not have a healthy Internet connection at the moment. The client will operate in offline mode until it is able to successfully connect to the backend.

[TrustyTechSG]

My project having the same issue with v3 and v4, everything works fine on v2.