Error: Opencart\Catalog\Controller\Product\Thumb::index(): Return value must be of type string, array returned
File: /home/vladyslav/ocionic/backend/catalog/controller/product/thumb.php
Line: 41

Backtrace: 0
File: /home/vladyslav/ocionic/backend/system/engine/loader.php
Line: 112
Class: Opencart\Catalog\Controller\Product\Thumb
Function: index

Backtrace: 1
File: /home/vladyslav/ocionic/backend/catalog/controller/product/category.php
Line: 274
Class: Opencart\System\Engine\Loader
Function: controller

Backtrace: 2
File: /home/vladyslav/ocionic/backend/system/engine/action.php
Line: 96
Class: Opencart\Catalog\Controller\Product\Category
Function: index

Backtrace: 3
File: /home/vladyslav/ocionic/backend/system/framework.php
Line: 259
Class: Opencart\System\Engine\Action
Function: execute

Backtrace: 4
File: /home/vladyslav/ocionic/backend/index.php
Line: 20
Function: require_once