como solucionar problema de archivo

[AsherSmoke]

cuando intento ejecutar el modo multijugador me sale esto Error during initialization:
Missing config file "default_mp_controls.cfg" during initiliazation. May need to add to code_pre_gfx.

[HannesC]

Repair your game files https://plutonium.pw/docs/repair/#the-repair-process-for-t4-and-t6