After an upgrade to DocuWare Version 6.5, it may occur that a message is displayed after the login into the Administration:
"Passphrase must be between 12 and 16 characters"

The user cannot click on any node in the Administration, the message is displayed repeatedly.

To solve the problem, go to the bottom of Organization -> General and enter a valid passphrase (click on "Change" before to enable the text field):