Can't access to products in back office

[et-taousy]

Hi there i get this issue all id_category is Integer but i get this :

prestashop 1.6.1.5

Thanks for help!

[PrestaShopException]

Root category must be an integer value
at line 212 in file classes/helper/HelperTreeCategories.php

207. }
208.
209. public function setRootCategory($value)
210. {
211. if (!Validate::isInt($value)) {
212. throw new PrestaShopException('Root category must be an integer value');
213. }
214.
215. $this->_root_category = $value;
216. return $this;
217. }

• HelperTreeCategoriesCore->setRootCategory - [line 2504 - controllers/admin/AdminProductsController.php] - [1 Arguments]
• AdminProductsControllerCore->initContent - [line 189 - classes/controller/Controller.php]
• ControllerCore->run - [line 367 - classes/Dispatcher.php]
• DispatcherCore->dispatch - [line 58 - admin/index.php]

Edited April 19, 2016 by et-taousy (see edit history)