I am having this same issue. Anyone know the cause?
Try IE - browser options
1. Go to Security tab.
2. click Sites button (highlighted with a red rectangle).
4. click Another button (highlighted with a green rectangle).
5. To make it easier, turn all switches to the mode allowed or enabled. By default they are in a mode to disable or offer.
I haven't found exactly what switches you want to include, so I included all :-) And works fine.
Use the DLP patch3-McAfeeDLPEndPoint93300Licensed ..issue is resolved
Now available version McAfeeDLPEndPoint93400Licensed (from 21.01.2015).