3D FlipBook - Adding pdf - 3D Flipbook with WordPress 5.4.1

Dear team i am having a issue adding a new 3D flipbook. I am doing it with a pdf, everithing seems to work, including the flipbook pre-visualization but when i finish the process and go to the final page, comes the message "loading WEBGL 3D..." and the flipbook does not appear.

Can you please help me.

That´s my firt time with wordpress and also with flipbook.

I'm testing the free version to see if I activate the premium

Beste Regards