[Snukfin's Server Side Z(S)ombies]

not sure if this has any help in narrowing down the issue: 
858b342e2ec84f598a70e52b667e9627
 

"(Filename: <858b342e2ec84f598a70e52b667e9627> Line: 0)

NullReferenceException: Object reference not set to an instance of an object
  at AvatarZombieController.LateUpdate () [0x00019] in <858b342e2ec84f598a70e52b667e9627>:0 
  at AvatarZombie01Controller.LateUpdate () [0x00000] in <858b342e2ec84f598a70e52b667e9627>:0 "

[Snukfin's Server Side Z(S)ombies]

Okay so short way to explain it. I came across a server with Snukfin's sever side zombies and thought it'd be interesting to spice up the nightmare run but every time I encounter any of the Snukfin zombies all receive in my console both for dedicated server and non dedicated server is as follows -

"nullreferenceexception object reference not set to an instance of an object" 

Please can someone help me as i'm not sure what the issue is
Thank you v much

Edit: Only mod used is Snukfin zombies and research (no idea how much ram in server)
not sure how to link the .txt report