Although you may have supplied the correct authentication details, the authentication failed because the method that the server is using is not supported by the KDE program implementing the protocol %1.
Er eich bod wedi darparu' r manylion dilyiant cywir, methodd y dilysiant o achos ni chynhelir y dull a ddefnyddir gan y gweinydd gan y rhaglen KDE sy' n cyflawni' r protocol% 1.