After the add to cart button I'm getting some code saying class="shutterset_singlepic2019". I have no idea where to go looking for this code to fix it. There's obviously a mistake somewhere, but would this be in the WP_SPSC files, the Nextgen files, or my theme files?
Any help would be greatly appreciated.
Example of the error can be seen here: website.
http://wordpress.org/extend/plugins/wordpress-simple-paypal-shopping-cart/
[No bumping. If it's that urgent, consider hiring someone.]