Warning: Undefined variable $product_info in /home/shambhal/op.shambhalnetworks.in/extension/formula41/catalog/controller/event/product.php on line 218Warning: Trying to access array offset on value of type null in /home/shambhal/op.shambhalnetworks.in/extension/formula41/catalog/controller/event/product.php on line 218Error: Opencart\System\Library\Cart\Tax::calculate(): Argument #2 ($tax_class_id) must be of type int, null given, called in /home/shambhal/op.shambhalnetworks.in/extension/formula41/catalog/controller/event/product.php on line 218 File: /home/shambhal/op.shambhalnetworks.in/system/library/cart/tax.php Line: 123 Backtrace: 0 File: /home/shambhal/op.shambhalnetworks.in/extension/formula41/catalog/controller/event/product.php Line: 218 Class: Opencart\System\Library\Cart\Tax Function: calculate Backtrace: 1 File: /home/shambhal/op.shambhalnetworks.in/system/engine/action.php Line: 96 Class: Opencart\Catalog\Controller\Extension\Formula41\Event\Product Function: before Backtrace: 2 File: /home/shambhal/op.shambhalnetworks.in/system/engine/event.php Line: 72 Class: Opencart\System\Engine\Action Function: execute Backtrace: 3 File: /home/shambhal/op.shambhalnetworks.in/system/engine/loader.php Line: 183 Class: Opencart\System\Engine\Event Function: trigger Backtrace: 4 File: /home/shambhal/op.shambhalnetworks.in/catalog/controller/product/product.php Line: 455 Class: Opencart\System\Engine\Loader Function: view Backtrace: 5 File: /home/shambhal/op.shambhalnetworks.in/system/engine/action.php Line: 96 Class: Opencart\Catalog\Controller\Product\Product Function: index Backtrace: 6 File: /home/shambhal/op.shambhalnetworks.in/system/framework.php Line: 259 Class: Opencart\System\Engine\Action Function: execute Backtrace: 7 File: /home/shambhal/op.shambhalnetworks.in/index.php Line: 20 Function: require_once