Image gallery thumbnails redirecting to the single post page

Hi, chaps…

Hope anyone can help me with this…

When clicking the image thumbnail in a single post gallery, instead of taking me to the defined (media image file) it takes me to the same single post page… it’s really wird, since doesn’t let me see the single image.

Take a look, is happening here: https://sitiosguau.com/querida-martha-mascota/

and here, as you see, every single image in the gallery is pointing to the media file: https://cl.ly/image/0A2O1A3T0g2R

Any help would be much apreciatted