Telekom recently switched their MagentaCLOUD service to a new system. Unfortunately Steganos Password Manager has not been updated to work with that new system yet. We are aware of the problem and are working to fix it in the upcoming weeks.
In the meantime you can use one of the other available cloud services to synchronize your passwords. Since the keychains are encrypted locally before they are uploaded to the cloud, it is irrelevant which cloud service you use to synchronize them. Of course a strong master password is required in any case.
Alternatively, you can synchronize your passwords manually: Synchronizing mobile devices without using cloud services (for Password Manager 22)