After entering the PIN, the following message is displayed

Error message:
error 401 calling service 'https://logging.bnotk.de/auth/realms/RemoteSignature/auth/tls', Unauthorized

Possible Cause:

• Signature card blocked:
  This error message is displayed when access to the signature card is blocked by another application, for example GV software or online banking.
  Solution: Please close the third-party application completely (system tray) and start the signing process again.
• Can not reach server:
  If the server of the Federal Chamber of Notaries is temporarily unavailable, the above message also appears. In this case, wait and start the signature process again later.

Error message:
No keys available

• In this case, please ask the support of the Federal Chamber of Notaries whether your signature certificate has been created and is available.