Fatal error: Uncaught Error: Call to a member function getIdentities() on null in /home/lg/public_html/vendor/magento/module-catalog/Block/Category/View.php:177 Stack trace: #0 /home/lg/public_html/vendor/magento/module-page-cache/Model/Layout/LayoutPlugin.php(71): Magento\Catalog\Block\Category\View->getIdentities() #1 /home/lg/public_html/vendor/magento/framework/Interception/Interceptor.php(152): Magento\PageCache\Model\Layout\LayoutPlugin->afterGetOutput(Object(Magento\Framework\View\Layout\Interceptor), ' <script>\n ...') #2 /home/lg/public_html/var/generation/Magento/Framework/View/Layout/Interceptor.php(494): Magento\Framework\View\Layout\Interceptor->___callPlugins('getOutput', Array, Array) #3 /home/lg/public_html/vendor/magento/framework/View/Result/Page.php(243): Magento\Framework\View\Layout\Interceptor->getOutput() #4 /home/lg/public_html/vendor/magento/framework/View/Result/Layout.php(164): Magento\Framework\View\Result\Page->render(Object(Magento\Framework\App\Response\Http\Interceptor)) #5 /home/lg/pub in /home/lg/public_html/vendor/magento/module-catalog/Block/Category/View.php on line 177