Your system administrator installed Citavi so that it's not possible to log in to Citavi Account.
Ask your system administrator if the setting can be changed in the Windows Registry:
- On a 64-bit computer:
HKLM\Software\Wow6432Node\Swiss Academic Software\Citavi 6\AdminSettings
- On a 32-bit computer:
HKLM\Software\Swiss Academic Software\Citavi 6\AdminSettings
The value for DisableCitaviAccount needs to be changed from "true" to "false".