Hii
I have the problem on this link catering-factory.ch/dekorationen that the Simple Image Gallery do not open the images in a popup.

I looked in the forum for some similar problems and have found. But solutions there can't help me.

Can someone help me?

Best Regards
developics

Hi. Your site is loading the jQuery library three times. That's causing a javascript error and breaks the popup. You need to resolve this. Simple Image Gallery has an option for disabling it's jQuery instance. However you need to find which extension ( or your template ) is loading the other instances.