unresolved external symbol c++ (.obj) [duplicate]

  .obj, c++, lnk2001

So im trying to add a bhop feature to this base I found called GOESP its on github I have everything set and ready to compile then when I do I get this error. How would I go about fixing this?
Severity Code Description Project File Line Suppression State
Error LNK2001 unresolved external symbol "struct game_data::weapon_info const * __vectorcall game_data::get_weapon_info(int)" ([email protected][email protected]@[email protected]@[email protected]) GOESP C:UsersnoodleDesktopGOESP-masterGOESPNetvars.obj 1

error screenshot

Source: Windows Questions C++