Could not find shared.lua

I am trying to create a gamemode but I keep getting this error: Couldn’t include file ‘shared.lua’ (File not found) (@gamemodes/game/gamemode/cl_init.lua (line 3)). I am wondering what is causing this and how can I fix it. Here is the code:

cl_init.lua


include( 'shared.lua' )

function GM:Initialize()

end

init.lua


AddCSLuaFile( "cl_init.lua" )
AddCSLuaFile( "shared.lua" )

include( 'shared.lua' )

function GM:PlayerInitialSpawn(ply)

		ply:Give( "weapon_physcannon" ) // A Gravity gun
		ply:Give( "weapon_physgun" ) // A Physics gun
		ply:Give( "gmod_tool" )

end

shared.lua


DeriveGamemode("sandbox")

GM.Name = "Game"
GM.Author = "Erigitic"
GM.Email = "N/A"
GM.Website = "N/A"

Thanks ahead of time for the help.

You can’t call AddCSLuaFile on a clientside file. Remove that line from cl_init.lua

Thanks. Still giving the same error.