Hello i keep getting this error on my server. It only happends wen the server i populated

ERROR: script runtime error
(see console for details)
(file 'maps/mp/gametypes/_callbacksetup.gsc', line 56)

********************
----- Server Shutdown -----
Sending heartbeat to cod2master.activision.com
==== ShutdownGame ====
Going to CS_ZOMBIE for Unknown Soldier
0:Unknown Soldier EXE_DISCONNECTED
Going to CS_ZOMBIE for Dr_Ljuba
1r_Ljuba EXE_DISCONNECTED
Anyone got any idea whats wrong?