Camera widget - Snapshot Image binding?

In camera widget there are 3 options:

  • Viideo URL
  • Snapshot URL
  • Snapshot Image

All these with the option of “Bind an Item”. But when I tap on this, I only get items to the Viideo and Snapshot URL, at Snapshot Image I get “No matching items”.
How should I configure Home Assistant so that I can have image snapshots selectable here?