When im starting a VM using external network it does not boot up at all!!!!!

The error message is:

"VM  is down with error. Exit message: unsupported configuration: filterref is not supported for network interfaces with virtualport type openvswitch"

I rolled it back to 4.2.7.1 for 1 of my hosts just as a test and the VMs on that host can now bootup using external networks as they are supposed to!!

Please advice as i would like to use the upgrade!!!