‘On Click’ link won’t open on same page

Hi!

I set up my gallery a while back and it was working wonderfully but after a site migration, I ran into the issue that when clicking on the image it opens the link on a new page even when it is set to open on the same page.

I set up the link again, specified on the ‘Target’ dropdown that it should open on the same page, publish it, and still no change. I even go back to editing the block and the ‘Target’ dropdown is blank.

I don’t know why this is happening but I hope you can shed a light on how should I proceed, thank you!

The page I need help with: [log in to see the link]