Fatal error: Uncaught Error: Class 'OneLogin_Saml2_Response' not found in /var/www/html/lib/php-saml/lib/Saml/Response.php:3 Stack trace: #0 /var/www/html/lib/php-saml/compatibility.php(9): require_once() #1 {main} thrown in /var/www/html/lib/php-saml/lib/Saml/Response.php on line 3