Invisible Zeds

6 June 2017 - This morning played a couple of maps, no problems. This afternoon (2:00 Eastern) I started a map and ALL the Zeds were invisible. I let them kill me and tried a different map, the Zeds still invisible. I exited the game and verified KF2 game files, one file was replaced and I tried another map with same results, ALL Zeds invisible. I restarted the server and same result, invisible Zeds... I checked several other of our servers same result... Please Help!

Invisible Zeds