Gallery display issues

I’m having a problem with my galleries that I want to use for proofing. The thumbnails on the page load fine but when you open an image in the lightbox you can’t move back and forth from picture to picture. When you close the image, the pages where the thumbnails are goes blank. Trying to figure out what is causing this. I just purchased NextGen Pro so I assume its the latest as it was just installed.

http://provocateurimages.ca/testgallery/

Hosted by GoDaddy
Problem is on multiple browsers

https://wordpress.org/plugins/nextgen-gallery/