Run mode-only notification: Firestore Security Rules Error on Container: Missing or insufficient permissions.

I had this problem when the date set in the rule for use in the Firebase storage database expired (the date set when the project was created in Firebase). By modifying this date I was able to continue. I hope it helps.

match /{document=**} {

// This rule allows anyone with your database reference to view, edit,

// and delete all data in your database. It is useful for getting

// started, but it is configured to expire after 30 days because it

// leaves your app open to attackers. At that time, all client

// requests to your database will be denied.

//

// Make sure to write security rules for your app before that time, or

// else all client requests to your database will be denied until you

// update your rules.

allow read, write: if request.time < timestamp.date(2040, 3, 30);

}