I'm interested in how I can add my custom round sounds to a map, as seeing it has been done on a community map already. I would be much obliged if I can get help on this

Just after compiling the setup map, I load it up fresh from the launcher. However, before I spawn into the map I get "Script Runtime error (see console for details) Unknown Item  'Zombie_bowie_flourish' "
It would be much obliged if I could get help on this issue

Thanks for you time~