3D FlipBook - Hello, I just purchased 3D FlipBook for WordPress but the plug-in has caused errors throughout the page that display

Hello,

I just purchased 3D FlipBook for WordPress but the plug-in has caused errors throughout the page that display ”<$tr>” under the menu and table of contents. Can you please fix this issue or process a refund as this is obviously not how the plugin should display to my customers.

Regards