OpenCart Community

Hi
i got some error , i have no idea how to solve it, can give me some advise ?

Fatal error: Call to undefined function strto() in /home/admin03/public_html/vqmod/vqcache/vq2-system_storage_modification_admin_controller_sale_order.php on line 188

the problem should be related for vqmod or sale_order.php?

Problem is caused by a vQmod file that is modifying this file: admin/controller/sale/order.php

Try disabling recently installed extensions one at a time to find which one is causing the error then go back to the developer for support