Unhandled Promise rejection: this._next is not a function : Zone in @angular/fire/messaging

Question

When I am receiving firebase push notifications in the foreground, by using @angular/fire/messaging. The method is:

  this.angularFireMessaging.         


        

Answer 1

The problem is indeed related to the version of Firebase! Finally, I found the solution is detailed here.

You must have firebase library version greater than 7.16 inside your package.json and it should match the version in firebase-messaging-sw.js