Протокол = http / 1.0, код = 500, сообщение = внутренняя ошибка сервера в модификации 2.0 android

Я использую модифицированную версию 2.0 для подключения к серверу, я получаю вывод в Postman, но пока я запускаю этот API в android, я получаю эту ошибку «протокол = http / 1.0, код = 500, сообщение = внутренняя ошибка сервера»

Это мой код интерфейса: -

public interface SetEmployeeActivityInterface {
@Headers("Accept: application/json")
@POST("setEmployeeActivity.php")
@FormUrlEncoded
Call<SetEmployeeActivityDetails> SET_EMPLOYEE_ACTIVITY_DETAILS_CALL
        (@Field("user_id") String user_id,
        @Field("secure_key") String secure_key,
        @Field("order_id") String order_id,
        @Field("home_in_location") String home_in_location,
        @Field("home_in_date_time") String home_in_date_time,
        @Field("home_out_location") String home_out_location,
        @Field("home_out_date_time") String home_out_date_time,
        @Field("cust_in_location") String cust_in_location,
        @Field("cust_in_date_time") String cust_in_date_time,
        @Field("cust_out_location") String cust_out_location,
        @Field("cust_out_date_time") String cust_out_date_time,
        @Field("lunch_in_location") String lunch_in_location,
        @Field("lunch_in_date_time") String lunch_in_date_time,
        @Field("lunch_out_location") String lunch_out_location,
        @Field("lunch_out_date_time") String lunch_out_date_time,
        @Field("hotel") String hotel,
        @Field("comment") String comment);

}

Это мой код деталей API: -

public class SetEmployeeActivityDetails {
//{"output":[{"success":"yes","message":"Status successfully updated !"}]}
@SerializedName("output")
public List<SetEmployeeActivityDetails.SetEmployeeActivityOutput> setEmployeeActivityOutputList = new ArrayList();
public class SetEmployeeActivityOutput {
    //{"output":[{"success":"no","message":"Successfully Updated !"}]}
    @SerializedName("success")
    public String success;

    @SerializedName("message")
    public String message;
}

}

Это мой код активности: -

 dbHelper.updateJobCompletedStatus(customer_id, order_id, "yes");

                            //Calling webservise for send engineer activity
                            ArrayList<Query> getEngineerActivityQueryArrayList = new ArrayList<>();
                            getEngineerActivityQueryArrayList = dbHelper.getDataFromTb_Report_Status_table_for_Validation(user_id, order_id);
                            if (null != getEngineerActivityQueryArrayList && !getEngineerActivityQueryArrayList.isEmpty()) {
                                //Calling api for assign work
                                setEmployeeActivityInterface = APIClient.getClient().create(SetEmployeeActivityInterface.class);
                                Call<SetEmployeeActivityDetails> call2 = setEmployeeActivityInterface.SET_EMPLOYEE_ACTIVITY_DETAILS_CALL
                                        (user_id, secure_key,order_id,
                                                getEngineerActivityQueryArrayList.get(0).getHome_in_location(),
                                                getEngineerActivityQueryArrayList.get(0).getHome_in_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getHome_out_location(),
                                                getEngineerActivityQueryArrayList.get(0).getHome_out_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getCust_in_location(),
                                                getEngineerActivityQueryArrayList.get(0).getCust_in_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getCust_out_location(),
                                                getEngineerActivityQueryArrayList.get(0).getCust_out_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getLunch_in_location(),
                                                getEngineerActivityQueryArrayList.get(0).getLunch_in_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getLunch_out_location(),
                                                getEngineerActivityQueryArrayList.get(0).getLunch_out_date_time(),
                                                getEngineerActivityQueryArrayList.get(0).getHotel()
                                                , getEngineerActivityQueryArrayList.get(0).getShort_day_comment());
                                // Set up progress before call
                                final ProgressDialog progressDoalog;
                                progressDoalog = new ProgressDialog(getActivity());
                                //progressDoalog.setMax(100);
                                progressDoalog.setMessage("Loading please wait...");
                                progressDoalog.setTitle("Nimble");
                                //progressDoalog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
                                progressDoalog.setCancelable(false);
                                // show it
                                progressDoalog.show();
                                call2.enqueue(new Callback<SetEmployeeActivityDetails>() {
                                    @Override
                                    public void onResponse(Call<SetEmployeeActivityDetails> call, Response<SetEmployeeActivityDetails> response) {
                                        progressDoalog.dismiss();
                                        SetEmployeeActivityDetails signatureDetails = response.body();
                                        List<SetEmployeeActivityDetails.SetEmployeeActivityOutput> userdata = signatureDetails.setEmployeeActivityOutputList;
                                        if (userdata != null) {
                                            for (SetEmployeeActivityDetails.SetEmployeeActivityOutput userdatavalue : userdata) {

                                            }
                                        }
                                    }

                                    @Override
                                    public void onFailure(Call<SetEmployeeActivityDetails> call, Throwable t) {
                                        progressDoalog.dismiss();
                                        Toast.makeText(getActivity(), "Please try again... ", Toast.LENGTH_SHORT).show();
                                        call.cancel();
                                    }
                                });

Эта ошибка отображается в logcat: -

java.lang.NullPointerException: Attempt to read from field 'java.util.List nimble.nimble.nimble.APIDetails.SetEmployeeActivityDetails.setEmployeeActivityOutputList' on a null object reference