then what could it be?

[code] ZOMBIE MODE
   ----------------------*/
   [[level.DLC3.weapons]]();
   [[level.DLC3.powerUps]]();
   maps\ugx_jukebox::jukebox_precache();
   maps\_zombiemode::main();
   thread zombiesleft_hud();
   thread maps\ugx_jukebox::jukebox_init();
   
   /*---------------...

okay so im working with the jukebox and this error pops up and closes my gam every time i try to test my map
what am i doing wrong?