Error when changing Image in article

[Tantacula]

There's error in Pingpong/admin/presenters/article.php when try to access '$this->resource' object. You can locate it if try to edit article and change image. I suppose this is error of presenter package, but I use pingpong admin, so I write this error here.

ErrorException in Article.php line 10:
Trying to get property of non-object
in Article.php line 10
at HandleExceptions->handleError('8', 'Trying to get property of non-object', 'D:\OpenServer\domains\pingadmin.ru\vendor\pingpong\admin\src\Pingpong\Admin\Presenters\Article.php', '10', array()) in Article.php line 10
at Article->image_path()
at call_user_func(array(object(Article), 'image_path')) in Presenter.php line 44
at Presenter->__get('image_path') in Article.php line 127
at Article->deleteImage() in ArticlesController.php line 162