This error message appears when the central UHH-Login service of the University of Hamburg has not transmitted the attribute “eduPersonPrincipalName.”
This is a malfunction of the authentication service and can be caused by maintenance work or failed background services.
This is usually a temporary problem and should not occur again after a while. If in doubt, please contact the ServiceLine of the Regional Computing Center (RRZ): https://www.rrz.uni-hamburg.de/en/beratung-und-kontakt/serviceline.html