Flagging images

Hi all,

In not sure if this is a stupid question but I’m having issues letting users flag (like) other users images. When I go to create a new flag it only gives me options for nodes, users, comments, taxonomy, flagging and file. It does not give an option for image field.

Am I missing something?

Drupal version: 

Source: https://www.drupal.org/taxonomy/term/22/feed