Why is the left side of my flipbooks always white?
http://eml.c4b.myftpupload.com/?3d-flip-book=souvenir-the-village-of-melrose-park http://eml.c4b.myftpupload.com/?3d-flip-book=diamon-jubilee-of-melrose-park
Also, where do I plug in my license key? Not seeing it on the UI.
Because of your PDF http://eml.c4b.myftpupload.com/wp-content/uploads/2020/10/melrose-park-souvenir-1907.pdf, it has such pages. You do not need to insert license key now, this is for future.