help displaying the galleries

Hello, I have a special setup custom-coded using a multi-site plugin,
and I was hacked recently. I cannot get the galleries to show anymore.
I am prepared to pay for help.

Please take a look at http://www.viproom.fr and click on “photos” in the menu, then on any gallery, and you will see what I mean.

If this sounds ok for you please reply

Thank You!

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