Feed failed to load, got response code 404

[avoelkl]

The URL http://www.magenerds.com/category/magento-2/feed/ returns a 404, leading to an error in the Magento Backend:

Exception #0 (Zend_Feed_Exception): Feed failed to load, got response code 404

Exception #0 (Zend_Feed_Exception): Feed failed to load, got response code 404
#0 /.../vendor/magenerds/dashboard/Block/Adminhtml/Dashboard.php(55): Zend_Feed_Reader::import(‘http://www.mage...')
#1 /.../vendor/magenerds/dashboard/view/adminhtml/templates/dashboard.phtml(80): Magenerds\Dashboard\Block\Adminhtml\Dashboard->getBlogFeeds()
#2 /.../vendor/magento/framework/View/TemplateEngine/Php.php(59): include(‘/...‘)
#3 /.../vendor/magento/framework/View/Element/Template.php(270): Magento\Framework\View\TemplateEngine\Php->render(Object(Magenerds\Dashboard\Block\Adminhtml\Dashboard), ‘/...’, Array)