We are using ZENworks Configuration Mangement Standard 11 SP1 and are having the following problem:

After implementing under Configuration -> SystemUpdate -> MAR 2012 PRU (Status: Baselined), we get at all Workstation devices the following error:

Could not download bundle content for Knowledge Base Files [3.6.A.18.16] because a ZENworks Server could not be located.

Additional Information: None
Severity: Error
Date: March 2, 2012 11:29:04 AM
Acknowledged Date: None
Source: /Devices/Workstations/workstationname
Message ID: ActionMan.CouldNotLocateServer
Probable Cause URL: None
Log ID: 6dfebcd65c5b493aa0e3f4c928e6484f
Related Objects: /System/System Bundles/489d706f21d6a07bcbab8c3fce7ed64e

What is the problem and what can we do?