3D FlipBook - Sharing PDF - not working - it dont create a Link

Dear all!

I need help, i embedded the PDF it works super fine and I am realy happy with the Plugin i purchased. I embedded the first PDF here: https://www.steiner-wohnbau.at/sta-lan-wohnbauprojekt-stadt-landeck-kreuzbuehlgasse/, but the problem is if i use the "sharing" funktion, it will not generate an link to the page ore the PDF. What did i wrong? Thamk you im advance for your help. Kind regards from Austria. Julie