Error: Call to a member function getIdentities() on null in /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/module-catalog/Block/Category/View.php:179 Stack trace: #0 /var/www/vhosts/sciquip.co.uk/htdocs/generated/code/Magento/Catalog/Block/Category/View/Interceptor.php(77): Magento\Catalog\Block\Category\View->getIdentities() #1 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/module-page-cache/Model/Layout/LayoutPlugin.php(96): Magento\Catalog\Block\Category\View\Interceptor->getIdentities() #2 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/Interception/Interceptor.php(182): Magento\PageCache\Model\Layout\LayoutPlugin->afterGetOutput() #3 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/Interception/Interceptor.php(189): Magento\Framework\View\Layout\Interceptor->Magento\Framework\Interception\{closure}() #4 /var/www/vhosts/sciquip.co.uk/htdocs/generated/code/Magento/Framework/View/Layout/Interceptor.php(347): Magento\Framework\View\Layout\Interceptor->___callPlugins() #5 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/View/Result/Page.php(258): Magento\Framework\View\Layout\Interceptor->getOutput() #6 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/View/Result/Layout.php(171): Magento\Framework\View\Result\Page->render() #7 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/Interception/Interceptor.php(60): Magento\Framework\View\Result\Layout->renderResult() #8 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/Interception/Interceptor.php(174): Magento\Framework\View\Result\Page\Interceptor->___callParent() #9 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/Interception/Interceptor.php(189): Magento\Framework\View\Result\Page\Interceptor->Magento\Framework\Interception\{closure}() #10 /var/www/vhosts/sciquip.co.uk/htdocs/generated/code/Magento/Framework/View/Result/Page/Interceptor.php(95): Magento\Framework\View\Result\Page\Interceptor->___callPlugins() #11 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/App/Http.php(120): Magento\Framework\View\Result\Page\Interceptor->renderResult() #12 /var/www/vhosts/sciquip.co.uk/htdocs/generated/code/Magento/Framework/App/Http/Interceptor.php(23): Magento\Framework\App\Http->launch() #13 /var/www/vhosts/sciquip.co.uk/htdocs/vendor/magento/framework/App/Bootstrap.php(263): Magento\Framework\App\Http\Interceptor->launch() #14 /var/www/vhosts/sciquip.co.uk/htdocs/pub/index.php(40): Magento\Framework\App\Bootstrap->run() #15 {main}