3D FlipBook - Hi, I am having some issues with the plugin on mobile browsers. I have purchased the jquery only plugin and have

Hi, I am having some issues with the plugin on mobile browsers. I have purchased the jquery only plugin and have successfully got the app working on both mobile and desktop. However, on the mobile version, the close button on the app is slow to respond and at times, does not respond at all. Please let me know what I can do.