关于 Laravel-admin 的问题，提示 Missing argument 1 for App\Admin\Controllers\MessageController::form ()？

namespace App\Admin\Controllers;

use App\Models\SetQuestion;
use Encore\Admin\Form;
use Encore\Admin\Grid;
use Encore\Admin\Facades\Admin;
use Encore\Admin\Layout\Content;
use App\Http\Controllers\Controller;
use Encore\Admin\Controllers\ModelForm;
use App\Models\Message;

class MessageController extends Controller
{
    use ModelForm;

    /**
     * Index interface.
     *
     * @return Content
     */
    public function index()
    {

        return Admin::content(function (Content $content) {

            $content->header('留言列表');
            $content->description('');
            $content->body($this->grid());

        });
    }

    /**
     * Edit interface.
     *
     * @param $id
     * @return Content
     */
    public function edit($id)
    {

        return Admin::content(function (Content $content) use ($id) {
            $content->header('回复留言');
            $content->description('description');
            $content->body($this->form($id)->edit($id));
        });
    }

    /**
     * Make a grid builder.
     *
     * @return Grid
     */
    protected function grid()
    {

        return Admin::grid(Message::class, function (Grid $grid) {

            //$grid->disableCreation();
            $grid->id('编号')->sortable();
            $grid->user_name('会员账号');
            $grid->picture("相关图片")->display(function ($picture) {
                return "";
            });
            $grid->content("留言内容")->display(function ($content) {
                return getsre($content,25);
            });
            $grid->reply("回复留言")->display(function ($reply) {
                return getsre($reply,25);
            });

            $grid->filter(function($filter){

                // 去掉默认的id过滤器
                $filter->disableIdFilter();
                // 在这里添加字段过滤器
                $filter->like('user_name', '会员账号');
                $filter->like('content', '留言内容');
                $filter->between('created_at', "留言时间")->datetime();

            });

            $grid->created_at('创建时间');
            $grid->updated_at('更新时间');
        });
    }

    /**
     * Make a form builder.
     *
     * @return Form
     */
    protected function form($id)
    {

        return Admin::form(Message::class, function (Form $form) use($id) {

            $columns = json_decode($form->edit($id)->model()->columns);
            $form->display('id', '编号');
            $form->text('user_name', '会员账号')->readOnly();
            $form->embeds('questions','选项', function ($form) {
                $count = SetQuestion::all()->count();
                for ($i=1; $idisplay($question_v,$question_d);
                    $form->display($answer_v,$answer_d);
                }
            });

            $form->embeds('columns','表单信息', function ($form) use ($columns) {
                collect($columns)->map(function ($column,$key) use ($form){
                    $form->display($key);
                });
            });

            // $form->image('picture', '相关图片');

            $form->textarea('content', '留言内容')->readOnly();
            $form->textarea('reply', '回复内容');
            $form->display('created_at', '创建时间');
            $form->display('updated_at', '更新时间');
        });
    }
}

laravel-admin后台列表删除功能不能用，提示信息：Missing argument 1 for App\Admin\Controllers\MessageController::form()