3D FlipBook - My flipbooks aren't showing when im logged out

Hi! I have used 3d flipbook for a while and now i noticed that i can see my flipbooks when im logged in to backend of my wordpress page, but when i log out and go see the flipbooks front end they aren't here.

I noticed the issue today and i remember that when I had one flipbook on my page, I saw it even when i was logged out from my account, but now I only see all three flipbooks when im logged in to my wordpress account, but when i log out they disappear.

https://www.tiiamaatta.mediasaari.fi/cv/ here's the link to my webpage and where the issue is.