Arrayunion is not working in angular firebase . Can anyone give your suggestions to solve this problem?

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Typescript

Angular5

I'm trying to push element to the array in firestore but i'm getting firebase error , also fieldvalue is not supported .

version using : Angular: 14

FirebaseError: Function DocumentReference.update() called with invalid data. Unsupported field value: a custom gh object

What I have tried:

updateNames(name:string)
{
  return this.namesCollectionRef.doc(id).update({
    personName : arrayUnion(name)
  })
}