ServerScriptService.Script:62: attempt to index nil with 'lookVector'?

Im having a problem with mouse.lookvector

The Client Script

local UserInputService = game:GetService("UserInputService")

local player = game.Players.LocalPlayer

local Mouse = player:GetMouse()

local character = player.Character or player.CharacterAdded:Wait()

local PlayerFolder = character:WaitForChild("PlayerFolder")


local PlayerWelds = character:WaitForChild("PlayerWelds")

local Key = script.Keybind.Value



local active = false
local debounce = false
local cooldown = 2


UserInputService.InputBegan:Connect(function(Input ,IsTyping)
	if IsTyping then return end
	if (Input.KeyCode == Enum.KeyCode[Key]) then
		if debounce == false and active == false then
			debounce = true
			game.ReplicatedStorage.FireBallEvent:FireServer(active,PlayerFolder,PlayerWelds)
		end
	end
end)


UserInputService.InputEnded:Connect(function(Input)
	if (Input.KeyCode == Enum.KeyCode[Key]) then
		if debounce == true and active == false then
			active = true
			game.ReplicatedStorage.FireBallEvent:FireServer(active, PlayerFolder, Mouse.Hit)
		end
	end
end)


game.ReplicatedStorage.FireBallEvent.OnClientEvent:Connect(function()
	wait(cooldown)
	debounce = false
	active = false
end)

The Server Script

local RepStorage = game:GetService("ReplicatedStorage")
local Projectiles = RepStorage.Projectiles
local RightHand = nil
local holdanimTrack = nil
local holdAnim = nil
local InnerFireBall = nil
local mainWeld = nil

game.ReplicatedStorage.FireBallEvent.OnServerEvent:Connect(function(Player, active, PlayerFolder, PlayerWelds, PlayerBodyMovers)
	if active == false then
	local char = Player.Character
	local dmg = char:FindFirstChild("dmgValue")
	local Humanoid = char:FindFirstChild("Humanoid")
	
	RightHand = char:FindFirstChild("RightHand")
	
	holdAnim = Instance.new("Animation",PlayerFolder)
	holdAnim.AnimationId = "rbxassetid://4885604627"
	holdAnim.Parent = PlayerFolder
	
	holdanimTrack = Humanoid:LoadAnimation(holdAnim)
	holdanimTrack:Play()
	
	InnerFireBall  = Projectiles:WaitForChild("Inner"):Clone()
	InnerFireBall.Size = Vector3.new(0.1,0.1,0.1)
	InnerFireBall.Parent = PlayerFolder
	
	InnerFireBall.CFrame = RightHand.CFrame * CFrame.new(0,-0.5,0)
	mainWeld = Instance.new("Weld")
	mainWeld.Part0 = RightHand
	mainWeld.Part1 = InnerFireBall
	mainWeld.C0 =  RightHand.CFrame:Inverse()
	mainWeld.C1 = InnerFireBall.CFrame:Inverse()
	mainWeld.Name = "InnerFireBallWeld"
	mainWeld.Parent = PlayerWelds
		
	for fireballsizecount = 1,60,1 do
		InnerFireBall.Size = InnerFireBall.Size + Vector3.new(0.03,0.03,0.03)
		wait(0.1)
		end
	end
end)

game.ReplicatedStorage.FireBallEvent.OnServerEvent:Connect(function(Player, active, PlayerFolder, PlayerWelds, PlayerBodyMovers, Mouse)
	if active == true then
	local char = Player.Character
	local Humanoid = char:WaitForChild("Humanoid")
	
	holdanimTrack:Stop()
	holdAnim:Destroy()
	
	local releaseAnim = Instance.new("Animation",PlayerFolder)
	releaseAnim.AnimationId = "rbxassetid://4890399550"
	
	local releaseAnimTrack = Humanoid:LoadAnimation(releaseAnim)
	releaseAnimTrack:Play()
	
	mainWeld:Destroy()
	
	local BodyVelocity = Instance.new("BodyVelocity")
	BodyVelocity.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
	BodyVelocity.Velocity = Mouse.lookVector*30
	BodyVelocity.Parent = InnerFireBall
	
	game.ReplicatedStorage.FireBallEvent:FireClient(Player)	
	end
end)