FortiClient EMS 6.4.3 Update - Deployment State 150

Hello,

we just updated a well functioning 6.4.2 installation to 6.4.3.

Since then all endpoints show a red sign with X, having the message: "Endpoint Failed To Download Deployment Package"

And in the Log an Info-entry is listed for each endpoint: "MACHINENAME has entered deployment state 150 - Deployment error". Status of the endpoints is Managed and Policys as well as Profiles are in sync.

We did not change anything else before/after update to 6.4.3. Restart of services did not help.

Has anyone an idea of what the problem is?!

Thanks JP