The So Listing Tabs extension not working properly
referring to attachment when click audio the product picture not able to show for load

Same issue Facing

Dear Sir

Please go to the file /catalog/controller/extension/module/so_listing_tabs.php

and find:
include_once(DIR_SYSTEM . 'library/template/Twig/Autoloader.php');
=> Edit to:
if(!class_exists("Twig_Autoloader")) include_once(DIR_SYSTEM . 'library/template/Twig/Autoloader.php');

then click refresh modification and clear cache in admin to check site again

if you have any the problem please submit the ticket here to get our support faster www.smartaddons.com/support/tickets

thanks