An authentication exception occurred. Digwyddodd eithriad dilysu. Authentication credentials could not be found. Ni ellid dod o hyd i ddogfennau dilysu. Authentication request could not be processed due to a system problem. Ni ellid prosesu cais dilysu oherwydd problem gyda'r system. Invalid credentials. Dogfennau annilys. Cookie has already been used by someone else. Mae rhywun arall eisoes wedi defnyddio'r cwcis. Not privileged to request the resource. Heb y fraint i ofyn am yr adnodd. Invalid CSRF token. Tocyn CSRF annilys. No authentication provider found to support the authentication token. Heb ddod o hyd i ddarparwr dilysu i gefnogi'r tocyn dilysu. No session available, it either timed out or cookies are not enabled. Dim sesiwn ar gael, naill ai mae wedi dod i ben neu nid yw cwcis wedi'u galluogi. No token could be found. Heb ddod o hyd i docyn. Username could not be found. Heb ddod o hyd i enw defnyddiwr. Account has expired. Mae'r cyfrif wedi dod i ben. Credentials have expired. Mae'r dogfennau wedi dod i ben. Account is disabled. Mae'r cyfrif wedi'i analluogi. Account is locked. Mae'r cyfrif wedi'i gloi. Too many failed login attempts, please try again later. Gormod o ymdrechion mewngofnodi wedi methu, ceisiwch eto'n hwyrach. Invalid or expired login link. Dolen mewngofnodi annilys neu wedi dod i ben. Too many failed login attempts, please try again in %minutes% minute. Gormod o ymdrechion mewngofnodi wedi methu, ceisiwch eto ymhen %minutes% munud. Too many failed login attempts, please try again in %minutes% minutes. Gormod o ymdrechion mewngofnodi wedi methu, rhowch gynnig arall arni mewn %minutes% munud.|Gormod o ymdrechion mewngofnodi wedi methu, rhowch gynnig arall arni mewn %minutes% munud.