There is more than one TB2 Preferences file in your System Folder.

The TB2 Preferences file isn't in your System Folder.

Your passwords can't be updated because the TB2 Preferences  is open in another application.

You need to close some files before updating your passwords.

You need to free up more disk space before updating your passwords.

You need to unlock the startup volume before updating your passwords.

You need to unlock the TB2 Preferences file before updating your passwords.

Without the Control privilege you cannot reconnect to this headless server.  Define a password with the Control privilege or make the Control privilege public.

That password doesn't have the Control privilege.

The TB2 Preferences file is too old for your version of Timbuktu.

You need to free up more memory before update the passwords.Choose Help from the Timbuktu menu and see “Out of Memory.”

You need to switch this privilege off in the Public Privileges panel before using it in a password.

There is more than one entry with the same password.  You need to change one.