3D FlipBook - Print Base64 PDF

Hello. First of all, thank you for creating this useful plugin. I love it so much. Second, I want to ask, I'm showing the pdf book using base64 data. The book is showed up but sadly I cannot use the print button. When I click the button, it shows the print prompt but no book is showing. I have tried using url as the pdf and it work normal. Can anybody tell how to fix this?