Warning: Undefined variable $block in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Customer/templates/account/link/authorization-mobile.phtml on line 8

Fatal error: Uncaught Error: Call to a member function isLoggedIn() on null in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Customer/templates/account/link/authorization-mobile.phtml:8 Stack trace: #0 {main} thrown in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Customer/templates/account/link/authorization-mobile.phtml on line 8