Error: Opencart\System\Library\Response::setOutput(): Argument #1 ($output) must be of type string, null given, called in /www/wwwroot/001136.com/catalog/controller/duobao/detail.php on line 28
File: /www/wwwroot/001136.com/system/library/response.php
Line: 80

Backtrace: 0
File: /www/wwwroot/001136.com/catalog/controller/duobao/detail.php
Line: 28
Class: Opencart\System\Library\Response
Function: setOutput

Backtrace: 1
File: /www/wwwroot/001136.com/system/engine/action.php
Line: 96
Class: Opencart\Catalog\Controller\Duobao\Detail
Function: index

Backtrace: 2
File: /www/wwwroot/001136.com/system/framework.php
Line: 259
Class: Opencart\System\Engine\Action
Function: execute

Backtrace: 3
File: /www/wwwroot/001136.com/index.php
Line: 20
Function: require_once