Warning: Undefined variable $block in /home/airtimer/public_html/vendor/magento/module-instant-purchase/view/frontend/templates/button.phtml on line 10

Fatal error: Uncaught Error: Call to a member function isEnabled() on null in /home/airtimer/public_html/vendor/magento/module-instant-purchase/view/frontend/templates/button.phtml:10 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/magento/module-instant-purchase/view/frontend/templates/button.phtml on line 10