Why does flutter streambuilder query using 'orderby' cause an error

Why does my StreamBuilder return something went wrong? This stream works perfectly fine but when add orderBy it says that something went wrong. Database

Padding(
                      padding: const EdgeInsets.only(
                        left: 20,
                      ),
                      child: StreamBuilder<QuerySnapshot>(
                        stream: FirebaseFirestore.instance
                            .collection("notifications")
                            .where("parentUID",
                                isEqualTo:
                                    FirebaseAuth.instance.currentUser!.uid)
                            .orderBy('timestamp')
                            .snapshots(),
                        builder: (BuildContext context,
                            AsyncSnapshot<QuerySnapshot> snapshot) {
                          if (snapshot.hasError) {
                            return Text('Something went wrong');
                          }

                          if (snapshot.connectionState ==
                              ConnectionState.waiting) {
                            return Text("Loading");
                          }
                          return Column(
                            children: snapshot.data!.docs.map(
                              (DocumentSnapshot document) {
                                Map<String, dynamic> data =
                                    document.data()! as Map<String, dynamic>;
                                return adminNotifCard(
                                  text1: data['notifTitle'],
                                  text2: data['notifNotes'],
                                );
                              },
                            ).toList(),
                          );
                        },
                      ),
                    ),

Error