Light box close button ( the x) Is over the edge of the box

Hey
I stated using this and I really like it, the only issue I have is the x button to close the light box, is half outside the box and a bit underneath it.
It looks odd and its hard to close the light box.

Does anyone one know why?
Or has a tip to fix it?

Thanks
Chris 🙂

https://wordpress.org/plugins/wp-video-lightbox/