Cloud Firestore Backend: Backend didn't respond within 10 seconds

[verai17]

I am currently working on a client application and using angularfire for firebase integration. The application works fine on my local machine except that when deployed to the AWS server, the application would received this the error Cloud Firestore Backend: Backend didn't respond within 10 seconds. I have done many research on how to fixed this error, yet the error still persist. Please see below details.

Client Project:
Angular v12.2.11
Npm v6.14.12
Node v12.22.1

AWS Server:
Memory : 1024
CPU : 256

Solutions (tried and didn't work):

• Arrange configurations at app.module based on documentation
  Reference: https://github.com/angular/angularfire/blob/master/docs/install-and-setup.md

• Added Firebase Auth Persistence ‘NONE’

• Downgrade angularFire from into v7.2 to v7.0 with firebase v9.6

• Downgrade angularFire from into v7.0 to v6.1, and, Firebase from v9.6 to v8.10

• Downgrade Firebase from v8.10 to v7.24
  Reference: https://github.com/angular/angularfire

Hope someone from the community can help me out since its been weeks trying to resolve the issue. 🙏🏻

[rusudinu]

You can try to verify if the AWS server has outbound access to the Firebase backend and if there are any firewall or security groups that might be blocking the connection. Also, how close are the regions of the two services?