This is most likely a configuration problem on either the service provider or identity provider.
The debug information below may be of interest to the administrator / help desk:
SimpleSAML\Error\MetadataNotFound: METADATANOTFOUND('%ENTITYID%' => 'https://launchpad.viedu.org/simplesaml/module.php/saml/sp/metadata.php/default-sp')
Backtrace: 6 src/SimpleSAML/Metadata/MetaDataStorageHandler.php:331 (SimpleSAML\Metadata\MetaDataStorageHandler::getMetaData) 5 src/SimpleSAML/Metadata/MetaDataStorageHandler.php:348 (SimpleSAML\Metadata\MetaDataStorageHandler::getMetaDataConfig) 4 modules/saml/src/IdP/SAML2.php:339 (SimpleSAML\Module\saml\IdP\SAML2::receiveAuthnRequest) 3 [builtin] (call_user_func_array) 2 src/SimpleSAML/HTTP/RunnableResponse.php:68 (SimpleSAML\HTTP\RunnableResponse::sendContent) 1 /var/www/login/vendor/symfony/http-foundation/Response.php:423 (Symfony\Component\HttpFoundation\Response::send) 0 www/saml2/idp/SSOService.php:30 (N/A)
This error probably is due to some unexpected behaviour or to misconfiguration of SimpleSAMLphp. Contact the administrator of this login service, and send them the error message above.