Slider

Hello there.
I have a problem and I don’t know whether it is the theme or the slider revolution plugin that has been causing it.
As you see in the link (https://imgur.com/a/Ff12s) I have a slider with images and when I go to that page, the slider takes forever to load and it appears like that. I would like it to be loading normally, without showing that awkward white image behind.

Thank you for your help.

Ticket