If you are using the latest version of vQmod (2.4.x or higher), you may have some issues with Shoppica (2.2.4 or lower), which typically cause the following error to appear:

Fatal error: Call to a member function modCheck() on a non-object in....

In order to fix them, you need to replace the tb_themes/shoppica2/library/Utils.php with the attached one.

The other way to fix them is to replace the problematic code piece manually. Just open tb_themes/shoppica2/library/Utils.php and replace

public static function vqmodCheck($filename)
    {
        if (!array_key_exists('vqmod', $GLOBALS)) {
            return $filename;
        }

        global $vqmod;

        return $vqmod->modCheck($filename);
    }

with

    public static function vqmodCheck($filename)
    {
        if (array_key_exists('vqmod', $GLOBALS)) {
            global $vqmod;

            if (is_callable(array($vqmod, 'modCheck'))) {
                return $vqmod->modCheck($filename);
            }
        }

        if(class_exists('VQMod')) {
            return VQMod::modCheck($filename);
        }

        return $filename;
    }

This issue has been fixed with the latest Shoppica update – 2.2.5.
vQmod version 2.3.2 or lower is not affected.

Regards,
ThemeBurn team