Can not push 12.1.RU5 client to SEPM Server

I can push the new Version 12.1.5 (12.1.RU5) Build 5337 (12.1.5337.5000) to al servers and workstations except the SEPM server.

When i try to push the new version to the SEPM server i get:

SEPM server specs:

Microsoft Windows Server 2012 Standard (x64) (Running on Hyper-V Cluster)