Problem with player character

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#1

Hi i have a telekinesis power and i have a problem with player character

When i print the character it’s print my name but when i put Character.Head it’s give me error message
" ServerScriptService.Telekinesis:11: attempt to perform arithmetic (sub) on nil and Vector3 - Server"

here is my script:

local RE = game:GetService("ReplicatedStorage")
local TelekinesisEvent = RE.TelekinesisMouseMove 

local BodyPosition = Instance.new("BodyPosition")

local stepped
local RunService = game:GetService("RunService")

TelekinesisEvent.OnServerEvent:Connect(function(client, Character, mouse, target)
	stepped = RunService.Heartbeat:Connect(function()
		BodyPosition.Position = client.Character.Head.Position + (mouse - client.Character.Head.Position).Unit * 20
	end)
end)
#2

from the error, looks like mouse is nil, because the error says it’s on the substraction

#3

yes but i make good substraction

mouse.Move:Connect(function()
 if down == true and target ~= nil then
	RE.TelekinesisMouseMove:FireServer(Character, mouse.Hit.Position, target)
  end
end)