nrobn

The issue arises as keycloak uses a non-default OIDC method for this. Looking at their JS adapter implementation (https://github.com/keycloak/keycloak/blob/e69031d411c981fa78b8320b9588771069b4b86d/js/libs/keycloak-js/src/keycloak.js#L846), they have coded a registration endpoint, which will throw an error...