3D FlipBook - In case of use this plugin on sub directory of wordpress, It occur an error like this. [You have an error in your SQL

In case of use this plugin on sub directory of wordpress, It occur an error like this.

[You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘)’ at line 2] DELETE FROM wp_fb3d_pages WHERE page_ID IN ()

OK case. http://domain.com/

NG case http://domain.com/blog/

<p>please support me.</p>