any fix for this error code? [ server script compile error could not find script 'maps?_zombiemode_utlitily ]

[White x]

Every time i try to load in to dead ops arcade with my friends it kicks me out with this error code but i play it solo everything is fine and it runs normal... if any one has a fix for this pls let me know

[1227Root]

and if change utlitily to utility? maybe a spelling error?