We have a problem with the WDA MSS Leave Approval iView. We tested with an employee requesting an absence in ESS. That goes to the UWL of the manager. When the manager clicks on the workitem in UWL, a new window appears but only with blank header and the 'Close' button and nothing else. The same iView works correctly in preview mode.
We checked this site and found a similar problem reported http://scn.sap.com/thread/2140310 but that was solved by installing MSS Addon 1.0.
We are already using MSS Addon 1.0 patch 1. The XML file com.sap.pct.erp.mss.addon.xml was modified according to note 1600953 and uploaded correctly without errors. The UWL cache was cleared and then re-registered.
The backend configuration has the following:
Both employee and manager are in the same grouping absence-wise, so no issues with the manager not being able to see the absences for approval.