The Sparda-Bank Hamburt eG switched to a different IT system provider on November 9Th 2020: https://www.sparda-bank-hamburg.de/it-umstellung-2020.html

We already updated Outbank accordingly. To update your login data,  please follow the steps below:
‘Settings’ > ‘Bank credentials’ > ‘Select Sparda-Bank Hamburg login’ > ‘Add your new credentials’ > ‘Done’ > ‘Update configuration’