Have you installed the extension version that is correct for the cart version you are using??
here is the link to the product in Market Place
https://marketplace.abantecart.com/lightbox_html5
Also, are you sure that your minor changes haven't caused a conflict? We have this in use on several sites and have no issues with it.
here is the link to the product in Market Place
https://marketplace.abantecart.com/lightbox_html5
Also, are you sure that your minor changes haven't caused a conflict? We have this in use on several sites and have no issues with it.
