Fatal error: Uncaught Error: Interface 'SAML2\Exception\Throwable' not found in /var/www/alldocs/home/cmckay/cms_static/simplesamlphp_sp/vendor/simplesamlphp/saml2/src/SAML2/Exception/InvalidArgumentException.php:7 Stack trace: #0 {main} thrown in /var/www/alldocs/home/cmckay/cms_static/simplesamlphp_sp/vendor/simplesamlphp/saml2/src/SAML2/Exception/InvalidArgumentException.php on line 7