Pictures Won't Enlarge on IE & Chrome

Greetings,

I am having trouble getting my wowslider widget to work correctly on my website, when it is viewed in either Internet Explorer or Chrome. I click on the resize button on the picture and the picture does not go to full screen. Instead, the black bar at the bottom of the picture (which usually shows which image you are currently on) become expanded. Please advise upon how I can fix this error.

https://wordpress.org/plugins/wowslider/