VK.API method appWidgets.getImagesById how to designate an image in CoverList?

Question

In contact with

Hello, I'm trying to make a widget for my VK community.
The application and access rights were successfully issued to the application, but adding a widget of the CoverList type fails to return an error
rows[0].cover_id is not valid image id
"Regular" text widgets without pictures can be successfully added, but with a picture such an error
The request itself

return { 
    "title": "Титул", 
    "rows": [{ 
        "title": "Титул", 
        "button": "Кнопка", 
        "descr": "Описание", 
        "url": "", 
        "cover_id": "331011410_456240698", 
        "button_url": "" 
      }] 
};

Answer 1

Add 'photo' before the id of the picture

Answer 2

in the application of this widget, you can upload a file