How to diagnose «Something went wrong while saving the category»?

dmitrii_fediuk · August 4, 2017, 5:43pm

The «Something went wrong while saving the category» message is shown only by the

\Magento\Catalog\Controller\Adminhtml\Category\Save::execute() method:

magento/magento2/blob/2.2.0-RC1.6/app/code/Magento/Catalog/Controller/Adminhtml/Category/Save.php#L219-L223


} catch (\Exception $e) {
    $this->messageManager->addErrorMessage(__('Something went wrong while saving the category.'));
    $this->_objectManager->get(\Psr\Log\LoggerInterface::class)->critical($e);
    $this->_getSession()->setCategoryData($categoryPostData);
}

As you can see, the method logs its exception, so you should be definitely able to find its report in the exception log file.