whole Gallery is diappered :(

Hello,
We just start a new campaign with kids drawed pictures, and the first price is a complett photovoltic system for free…so we have a lot of intrest on it.

problem: The gallery worked just fine, but yesterday the page is seeable, but all pictures is disappeared. If I login to the admin site, everything looks fine, I see all 50 pieces of picture…

Do you have any idea?

https://www.smartnapelem.hu