Fatal error: Uncaught Error: Interface 'SAML2\SignedElement' not found in /var/www/alldocs/home/bwilliams/webdev_orig/simplesamlphp_sp.disabled/vendor/simplesamlphp/saml2/src/SAML2/Message.php:18 Stack trace: #0 {main} thrown in /var/www/alldocs/home/bwilliams/webdev_orig/simplesamlphp_sp.disabled/vendor/simplesamlphp/saml2/src/SAML2/Message.php on line 18