Why doesn't this script work?

local rate = 1/30

local tool = script.Parent
 
local event = tool:WaitForChild("RemoteEvent")

local handle = tool:WaitForChild("Handle")

local debris = game:GetService("Debris")

local windvec = Vector3.new(2, 1, 1)

local barreloffset = Vector3.new(0, 0, -1.5)


function drawbeam(beamstart, beamend, color, fadedelay)
	local dist = (beamstart - beamend).magnitude
	local laser = Instance.new("Part")
	laser.name = "Effect"
	laser.Anchored = true
	laser.CanCollide = false
	laser.Shape = "Block"
	laser.FormFactor = "Custom"
	laser.Size = Vector3.new(.2,.2,.2)
	laser.Transparency = .5
	laser.Material = "Plastic"
	laser.Locked = true
	laser.TopSurface = "Smooth"
	laser.BottomSurface = "Smooth"
	laser.BrickColor = color
	laser.CFrame = CFrame.new(beamend, beamstart) * CFrame.new(0, 0, -dist( 2) * CFrame.Angles(math.pi / 2, 0, 0))
		
	
		local mesh = Instance.new("SpecialMesh")
		mesh.Scale = Vector3.new(1, 5, 1)
		mesh.Parent = laser
		
		debris:AddItem(laser, fadedelay * 1) 
		laser.Parent = game.Workspace
		
		local frames = math.floor(fadedelay / rate)
		for frame = 1, frames do
			wait(rate)
			if laser then
				local percent = frame / frames
				laser.CFrame = laser.CFrame + (windvec * rate)
				laser.Transperency = .5 + (percent * .5)
			end
		end
		if laser then
			laser:remove()
		end
	end

event.OnServerEvent:connect(function(player, ...)
	local tuple = {...}
	if tuple[1] == "Fire" then
		local endpos = tuple[2]
		local hit = tuple[3]
		local fakestartpos = (handle.CFrame * CFrame.new(barreloffset)).p
		
		Spawn(function()
		drawbeam(fakestartpos, endpos, BrickColor.new("Institutional White"), .25)
		end)
		
		if hit and hit.Parent then
			local targethumanoid = hit.Parent:FindFirstChild("Humanoid")
			local targettorso = hit.Parent:FindFirstChild("Torso")
			if targethumanoid and targettorso and targethumanoid.Health > 0 then
				local net = Instance.new("TrussPart")
				net.Name = "Net"
				net.Size = Vector3.new(2, 6, 2)
				net.Style = "AlternatingSupports"
				net.Material = "Fabric"
				net.BrickColor = BrickColor.new("Pastel brown")
				net.CFrame = targettorso.CFrame
				net.CanCollide = false
				
				local weld = Instance.new("Weld")
				weld.Part0 = targettorso
				weld.Part1 = net
				weld.C0 = CFrame.new(0 ,-.4 - (math.random() * .4) ,0) * CFrame.Angles(0, math.pi * 2 * math.random(), math.pi * .3 * (math.random(0,1) - .5))
				weld.Parent = net
				
				targethumanoid.WalkSpeed = 6
				
				delay(5, function()
				   if net and targethumanoid and targethumanoid.Parent then
					net:remove()
					if not targethumanoid.Parent:FindFirstChild("Net") and targethumanoid.WalkSpeed < 16 then
						targethumanoid.WalkSpeed = 16
					end
				end
				end)
				
				if targethumanoid.Parent:FindFirstChild("Net") then
					delay(.5, function()
						
						if targethumanoid then
							if v and v.Name == "creator" then
								v:remove()
							end
							
						local tag = Instance.new("ObjectValue")
						tag.Name = "creator"
						tag.Value = player
						debris:AddItem(tag, 3)
						tag.parent = targethumanoid
							targethumanoid:TakeDamage(100)
						end
					end)
				end
				
				debris:AddItem(net, 6)
				net.Parent = hit.Parent
			end
		end
	end
end)

It looks like your trying to make the Net Gun in the tutorials, rewatch the video and redo the scripts. I figured out my error was in the LocalScript.

Edit: Also, if you test it on a server, when if you get an error when on the screen controlling the player its in the LocalScript most likely, and if its in the server window the error, its the normal Script/ServerScript that the error is in