My Image Links are All Broken Due to Theme?

If you look on this page.

https://www.1blogger1.com/improving-wordpress-text-editor/

Then click on my bookmark or share links at the bottom of the post. They open in a little window that is usually used for opening a thumbnail to a larger image.

I know it’s something to do with the theme but have no idea how to fix it. Can anyone help me out on this one to get it back to normal and working again..

Thank You.