3D FlipBook - NetworkError when attempting to fetch resource. See the debugging console for details (Ctrl+Shift+I in Chrome).

Urgent

We are having this issue on our website. We have bought the premium license but error is still there. It just say undefind on frontend nd do not load while on backend it says

Book is loading and then says

NetworkError when attempting to fetch resource. See the debugging console for details (Ctrl+Shift+I in Chrome).

Please help. I can provide site login on your reply.