Bad state: field does not exist within the DocumentSnapshotPlatform. Giving this error but don't know where the error is

Hi this is my code but it gives me this error: Bad state: field does not exist within the DocumentSnapshotPlatform. im not sure where is the error.

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

class OrderSuccessful extends StatefulWidget {
  @override
  _OrderSuccessfulState createState() => _OrderSuccessfulState();
}

  class _OrderSuccessfulState extends State<OrderSuccessful>{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Order Successful")),
      resizeToAvoidBottomInset: true,

      body: StreamBuilder(
        stream: FirebaseFirestore.instance.collection('personalinfo').snapshots(),
        builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot){
        if (!snapshot.hasData){
          return Text("no value");
        }
        return ListView(
          children: snapshot.data!.docs.map((document){
            return Text(document['personalinfo']);
          }).toList(),
        );
        },
        ),
    );
  }
}