Reviews Pop-Up

Hello,

I have some troubles with setting up the reviews to work. There is sometrhing pop-up but no message. I have no ideea where to start. You can see here: http://prntscr.com/hwaw98what I am talking about. Maybe is from the theme, or frome something else.

Any ideeas?

Thank you!

Most possibly 3rd party module overrides products:view_main_info hook and it causes the issue