ServerScriptService.Script:9: attempt to index nil with 'Chatted'?

function OnChatted(msg, speaker)
	local source = string.lower(speaker.Name)
	msg = string.lower(msg)
	if msg == ":sit" then
		speaker.Character.Humanoid.Sit = true
	end
end

game.Players.LocalPlayer.Chatted:Connect(OnChatted)

game.Players.PlayerAdded:Connect(function(player)
	player.Chatted:Connect(function(msg) OnChatted(msg, player)
	end)
end)

Why it says like that?

local Players=game:GetService"Players"
local prefix,cmds,findtarget,debounce,getmsg=":",nil,function(player,name)
	name=name or "me"
	local target;
	if name=="me"then
		target=player
	else
		for _,v in ipairs(Players:GetPlayers())do
			if v.Name:lower():sub(1,name:len())==name then
				target=v;break;
			end
		end
	end
	return target
end,{},function(tab)
	local str=""
	for i,v in ipairs(tab)do
	str=str.." "..v
	end
	return str
end
local admins,onChatted={RektwayYTB="Owner",Builderman="Admin",Noob="TempAdmin"},function(player,msg)
	if msg:sub(1,1)==prefix and msg:len()>1 then
		msg=msg:lower():sub(2,msg:len())
		local tab=string.split(msg," ")
		local cmd,arg1=tab[1],tab[2]
		table.remove(tab,1)table.remove(tab,1)
		cmd=cmds[cmd]
		if not cmd then return end
		local arg1s=arg1
		arg1=findtarget(player,arg1)or arg1
		cmd(player,type(arg1)~="string"and arg1 or nil,(arg1s or "")..getmsg(tab))
	end
end

cmds={
	ff=function(player,target)if not target then return end;Instance.new("ForceField",target.Character)end,
	unff=function(player,target)
		if not target then return end
		local char=target.Character
		local ff=char and char:FindFirstChildOfClass"ForceField"
		if ff then ff:Destroy()end
	end,
	respawn=function(player,target)if not target then return end;target:LoadCharacter()end,
	kick=function(player,target,msg)if target and target~=player then target:Kick(msg or "")end;end,
	kill=function(player,target)
		if not target then return end
		local char=player.Character
		local hum=char and char:FindFirstChildOfClass"Humanoid"
		if hum and hum.Health>0 then hum.Health=0 end
	end,
	punish=function(player,target)
		if not target then return end
		local char=target.Character
		if char then char.Parent=nil end;
	end,
	h=function(player,target,msg)
		local m=Instance.new("Hint",workspace)
		m.Text=msg
		wait(2)
		m:Destroy()
	end,
	m=function(player,target,msg)
		local m=Instance.new("Message",workspace)
		m.Text=msg
		wait(2)
		m:Destroy()
	end,
	admin=function(player,target,msg) 
		if not target or target==player then return end
		admins[target.Name]="TempAdmin"
	end,
	pa=function(player,target,msg) 
		if admins[player.Name]=="Owner"and target and target~=player then
		admins[target.Name]="Admin"end
	end,
	adminlist=function()for i,v in pairs(admins)do print(i,v)end;end; 
	
}
local function onPlayerAdded(player)
	if admins[player.Name]then
		player.Chatted:Connect(function(msg)
			if debounce[player.Name]then return end
			debounce[player.Name]=true
			pcall(onChatted,player,msg)
			wait(1)
			debounce[player.Name]=false
		end)
	end
end;Players.PlayerAdded:Connect(onPlayerAdded)
for _,v in ipairs(Players:GetPlayers())do
	onPlayerAdded(v)
end