^ "public_index_errr"

^ TypeError {#314
  #message: "Argument 1 passed to App\Comm\Utils\CollectionResult::setItems() must be of the type array, null given, called in /www/wwwroot/www.dxmooc.com/web/library/App/Module/CourseIdentity/UInterface/Action/ListInstructorSubject.php on line 58"
  #code: 0
  #file: "/www/wwwroot/www.dxmooc.com/web/library/App/Comm/Utils/CollectionResult.php"
  #line: 69
  trace: {
    /www/wwwroot/www.dxmooc.com/web/library/App/Comm/Utils/CollectionResult.php:69 {
      App\Comm\Utils\CollectionResult->setItems(array $items = []) …
      ›  */
      › public function setItems(array $items = [])
      › {
    }
    /www/wwwroot/www.dxmooc.com/web/library/App/Module/CourseIdentity/UInterface/Action/ListInstructorSubject.php:58 {
      App\Module\CourseIdentity\UInterface\Action\ListInstructorSubject->handle(BaseRequest $request, array $context = []) …
      › $list = $this->list($res->getItems(), $subjectType, $keyword);
      › $res->setItems($list);
      › 
    }
    /www/wwwroot/www.dxmooc.com/web/apps/web-v2/modules/Instructor/controllers/Detail.php:56 {
      DetailController->listSubject($infoId) …
      ›     'infoId' => $infoId,
      ›     'subjectType' => 'course',
      › ]);
    }
    /www/wwwroot/www.dxmooc.com/web/apps/web-v2/modules/Instructor/controllers/Detail.php:37 {
      DetailController->indexAction() …
      › $this->instractorInfo($id);
      › $this->listSubject($id);
      › $this->display('index');
    }
    DetailController->indexAction() {}
    /www/wwwroot/www.dxmooc.com/web/public/index.php:64 {
      ›     $app = new \Yaf\Application(APP_PATH.'/config/application.ini');
      ›     $app->bootstrap()->run();
      › } catch (\Error $exception) {
    }
  }
}