Running around Elektro without problem, all of a sudden i received an instant disconnection, following by re-logging back in to the game, I spawned atop a hillside as an infected Dean Hall. Unable to move or look around.

After Alt tabbing to close the game manually due to game crashing during the time spent idling as infected dean hall, I received a pop up before game failed to run stating:

Calling nonexistent function on class 'ZombieBase'
Class: 'MissionGameplay'
Function: 'OnMissionFinish'
Stack trace:
Scripts/missions/missionsGameplay.c:164
Abort/Retry/Ignore