Unable to use Firestore for fresh projects

Question

Further to I cannot enable firestore on a project although I'm not using AppEngine nor Datastore, we created a couple Firebase projects and specifically went out of our way to avoid setting up AppEngine or using the Datastore — because those evidently preclude setting up Firestore — yet we get an error attempting to enable Firestore.

When we click "Create Database" in the Firebase console, we get a "Cannot enable Firebase for this project / An unknown error occurred":

In attempting to diagnose this, in Google Cloud Console, it looks like the first AppEngine project is not set up (and it shouldn't be), speculating that perhaps the issue is with Datastore being enabled.

However, simultaneously we can "Disable application" under the App Engine => Settings:

So the question is: Why can't we enable Firestore for an effectively brand-new project? Is it related to AppEngine? Outside contacting support, is there a way to diagnose this?

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Incidentally, during testing I disabled AppEngine in Google Cloud Console, and "Firebase -> Database" now states “App Engine needs to be enabled to use Cloud Firestore"

Would it be correct to assume that this is part of a transitional period for AppEngine & Firestore, and that these issues should be sorted out in the very near future?

Answer 1

This can be a problem if you have some kind of extension in your browser for handling CORS errors(while xhr requests), just like i was facing the same issue with the extension enabled. Do check it after you disable the extension. Hopefully , it worked for me.

Answer 2

1. Disable CORS extention from the browser if you have installed one.
2. reload firebase site and click on enable button.

It will work successfully.