Thank you for your quick reply.
Yes it works everywhere, Windows Desktop & Laptop, Android Smartphone & Tablet, Iphone, but not on the IPad!
It opens a white square and thats it. Both Iphone and IPad have the same IOS and Browsers (Safari & Chrome) and it works fine on the IPhone but not on the IPad.
Both sites have the same version/hotfix of Kentico, and one works on the IPad and the other does not.