Runtime Error When Navigating KM Content in SAP Netweaver 7.4

Hi,

This is a new Installed Java only system based on SAP Netweaver 7.4. All the basic configurations and Single Sign on & ADS connectivity were successful. The system was delivered to the developers to perform the content creation & remaining development activities. But now they have raised a new message to me about saying KM content not working.

Runtime Error

An exception occured while processing the request.

Additional information: com.sapportals.wdf.WdfException: Can't load Layout class: com.sapportals.wdf.layout.HorizontalLayout
Exception ID = 408684e4-ee28-3110-5cbf-f6e837ed6014

Note: Tried for Logs but no help.

Kindly help Guys ASAP!!

Regards,

Mohammed Imran