Angular8 firebase configuration error '@angular/fire/angularfire2'

Question

When trying to \'ng serve\' after configuring angular with firebase, I got the error. Even though I googled this error message but could not find anything. In the error message,

Answer 1

{
  //...
  compilerOptions: {
    "skipLibCheck": true,
    //...
  }
}

this solution not advisable, its may give some build time error, i got error while build with SSR, i can suggest you to update "rxjs": ,if your are using * version then update it to 9