Warning: Undefined variable $block in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Sales/templates/order/order_track.phtml on line 4

Fatal error: Uncaught Error: Call to a member function getOrder() on null in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Sales/templates/order/order_track.phtml:4 Stack trace: #0 {main} thrown in /var/www/magento/html/app/design/frontend/bbnt/base/Magento_Sales/templates/order/order_track.phtml on line 4