My script here is not working

Help and Feedback Scripting Support
#1

server script:

local remote = game.ReplicatedStorage:WaitForChild("Hitted1")

remote.OnServerEvent:Connect(function(plr, target, mouseCFrame)
	if plr then
		if plr.Parent:FindFirstChild("Humanoid") then
			local lookVector = mouseCFrame.LookVector --Gets mouse CFrame

			if mouseCFrame.LookVector.Y < 0 then 
				lookVector = mouseCFrame.LookVector * Vector3.new(1,-1,1) --This is only to make player knockback upwards, and not downwards. You can remove this if you want.
			end

			local root = plr.Parent.HumanoidRootPart
			local velocity = Instance.new("BodyVelocity")

			local humanoid = plr.Character:WaitForChild("Humanoid")

			velocity.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
			velocity.P = 1500
			velocity.Velocity = lookVector * 5 * Vector3.new(5, 5, 5) --Get mouse direction and increases it, you can mess around with this values until you find a good one
			velocity.Parent = root
			wait(0.5)
			velocity:Destroy()
		end
	end
end)

local script:

local tool = script.Parent

local remote = game.ReplicatedStorage:WaitForChild("Hitted1")

local plr = game.Players.LocalPlayer

local mouse = plr:GetMouse()

tool.Activated:Connect(function()
	remote:FireServer(mouse.Target, mouse.Hit)
end)

this script above works last time now it’s not working and no errors
it’s supposed to knockback the player after hit with the tool
any help will work and post with the script

Velocity Not Working [SOLVED]
#2

can you provide more information like what is it supposed to do and what is the problem

#3 
local root = plr.Parent.HumanoidRootPart

Shouldn’t this be plr.Character.HumanoidRootPart? The player’s parent is going to be the player’s service.

#4