idk what to do but everytime i try to load into a server it says "this file is different from the server " and then says "plutonium_ui_mp.ff"

Sparrow
@Sparrow
idk what to do but everytime i try to load into a server it says "this file is different from the server " and then says "plutonium_ui_mp.ff"
Sorex can u link the cord then?