Fatal error: Uncaught Error: Call to a member function getParentDesignCategory() on string in /var/www/html/vendor/magento/module-catalog/Model/Design.php:85 Stack trace: #0 /var/www/html/vendor/magento/module-catalog/Helper/Product/View.php(108): Magento\Catalog\Model\Design->getDesignSettings(Object(Magento\Catalog\Model\Product\Interceptor)) #1 /var/www/html/vendor/magento/module-catalog/Helper/Product/View.php(229): Magento\Catalog\Helper\Product\View->initProductLayout(Object(Magento\Framework\View\Result\Page\Interceptor), Object(Magento\Catalog\Model\Product\Interceptor), Object(Magento\Framework\DataObject)) #2 /var/www/html/vendor/magento/module-catalog/Controller/Product/View.php(109): Magento\Catalog\Helper\Product\View->prepareAndRender(Object(Magento\Framework\View\Result\Page\Interceptor), 219, Object(Magento\Catalog\Controller\Product\View\Interceptor), Object(Magento\Framework\DataObject)) #3 /var/www/html/vendor/magento/framework/App/Action/Action.php(107): Magento\Catalog\Controller\Product\View->execute in /var/www/html/vendor/magento/module-catalog/Model/Design.php on line 85