RA metadata endpoint is not working

The URL at which the RA version 6.0.1 publishes it's metadata (https://<hostname>/authentication/metadata) returns an HTTP 500 error page.

Logs show that the RA is trying to start a SAML authentication, which it must not do for this route.

Logs:

{"message":"Checking for authenticator support.","context":{"firewall_name":"saml_based","authenticators":1},"level":100,"level_name":"DEBUG","channel":"security","datetime":"2024-11-17T18:38:18+01:00","extra":{"server":"ra. ...","application":"registration-authority","request_id":"d1c805595b4e8f868ab4c703cd203ad2"}}
{"message":"Checking support on authenticator.","context":{"firewall_name":"saml_based","authenticator":"Surfnet\\SamlBundle\\Security\\Authentication\\SamlAuthenticator"},"level":100,"level_name":"DEBUG","channel":"security","datetime":"2024-11-17T18:38:18+01:00","extra":{"server":"ra. ...","application":"registration-authority","request_id":"d1c805595b4e8f868ab4c703cd203ad2"}}
{"message":"Determine if StepupSamlBundle::SamlAuthenticator supports the request","context":{},"level":200,"level_name":"INFO","channel":"app","datetime":"2024-11-17T18:38:18+01:00","extra":{"server":"ra. ...","application":"registration-authority","request_id":"d1c805595b4e8f868ab4c703cd203ad2"}}
{"message":"Authenticator does not support the request.","context":{"firewall_name":"saml_based","authenticator":"Surfnet\\SamlBundle\\Security\\Authentication\\SamlAuthenticator"},"level":100,"level_name":"DEBUG","channel":"security","datetime":"2024-11-17T18:38:18+01:00","extra":{"server":"ra. ...","application":"registration-authority","request_id":"d1c805595b4e8f868ab4c703cd203ad2"}}
{"message":"Uncaught PHP Exception TypeError: \"Surfnet\\StepupRa\\RaBundle\\Controller\\SamlController::__construct(): Argument #2 ($remoteIdp) must be of type Surfnet\\SamlBundle\\Entity\\IdentityProvider, null given, called in /var/www/html/var/cache/prod/ContainerBmnwuOU/getSamlControllerService.php on line 30\" at SamlController.php line 33","context":{"exception":{"class":"TypeError","message":"Surfnet\\StepupRa\\RaBundle\\Controller\\SamlController::__construct(): Argument #2 ($remoteIdp) must be of type Surfnet\\SamlBundle\\Entity\\IdentityProvider, null given, called in /var/www/html/var/cache/prod/ContainerBmnwuOU/getSamlControllerService.php on line 30","code":0,"file":"/var/www/html/src/Surfnet/StepupRa/RaBundle/Controller/SamlController.php:33"}},"level":500,"level_name":"CRITICAL","channel":"request","datetime":"2024-11-17T18:38:18+01:00","extra":{"server":"ra. ...","application":"registration-authority","request_id":"d1c805595b4e8f868ab4c703cd203ad2"}}