applet_registration_unauthorized· code· HTTP 403· scope endpoint· applies to service_call, auth_decisionAn Applet registration or transaction attempted to enter a Realm without an explicit grant from the Realm owner, Realm admin, or Realm-policy-authorized administrator actor, as checked by the Station authorization capability. Namespace claims and self-signed applet registration are insufficient. See zh/extensions/applet-integration.md §4.