Warning: Undefined variable $block in /var/www/magento/html/app/code/Aligent/CMSMegamenu/view/frontend/templates/widget/megamenu.phtml on line 2

Fatal error: Uncaught Error: Call to a member function getMegamenuItems() on null in /var/www/magento/html/app/code/Aligent/CMSMegamenu/view/frontend/templates/widget/megamenu.phtml:2 Stack trace: #0 {main} thrown in /var/www/magento/html/app/code/Aligent/CMSMegamenu/view/frontend/templates/widget/megamenu.phtml on line 2