One user reported this issue that they are facing this error,"error] 91095#91095: *412224 FastCGI sent in stderr: “PHP message: PHP Fatal error: Uncaught Error: Call to undefined function is_amp_endpoint() in /www/dovetail_705/public/wp-content/plugins/accelerated-mobile-pages/includes/thirdparty-compatibility.php:1918"
One user reported this issue that they are facing this error,"error] 91095#91095: *412224 FastCGI sent in stderr: “PHP message: PHP Fatal error: Uncaught Error: Call to undefined function is_amp_endpoint() in /www/dovetail_705/public/wp-content/plugins/accelerated-mobile-pages/includes/thirdparty-compatibility.php:1918"
Reference ticket: https://wordpress.org/support/topic/php-error-656/