Trouble Detecting Humanoid

Help and Feedback Scripting Support
#1

I have a script that allows the player to view houses and teleport to them.
I want to make it where the player cannot teleport if they are sitting because then the vehicle will teleport with them. I keep getting an error at line 76 saying: “attempt to index nil with ‘sit’”.
It is also printing the humanoid as nil.

Code:

local plr = game.Players.LocalPlayer
local char = plr.Character or plr.CharacterAdded:Wait()
local Human = char:FindFirstChildWhichIsA("Humanoid")
print(char)
print(Human)
local cam = workspace.CurrentCamera
local Label = script.Parent.TextLabel
local HouseTP = game.ReplicatedStorage.HouseTP
local Button = script.Parent.TextButton
local HouseNum = "House 1"
local Warn = game.StarterGui.ScreenGuis.WarningFrame.TextLabel

local function alphabeticalOrder(instance)
	local children = instance:GetChildren()
	table.sort(children, function(c1, c2)
		return tonumber(c1.Name) < tonumber(c2.Name)
	end)
	return children
end

local camParts = alphabeticalOrder(workspace.Cameras)
local LArrow = script.Parent.LeftArrow
local RArrow = script.Parent.RightArrow
local GUI = script.Parent.Parent.ButtonFrame.Houses
local arrowClickCooldown = false

GUI.MouseButton1Click:Connect(function()
	if script.Parent.Visible == false then
		LArrow.Visible = true
		RArrow.Visible = true
		cam.CameraType = Enum.CameraType.Scriptable
		cam.CFrame = camParts[1].CFrame
		local camNumber = 1
		RArrow.MouseButton1Click:Connect(function()
			if arrowClickCooldown then return end
			arrowClickCooldown = true
			if camNumber == #camParts then
				cam.CFrame = camParts[1].CFrame
				camNumber = 1
				HouseNum = "House "..tostring(camNumber)
				Label.Text = HouseNum
			else
				cam.CFrame = camParts[camNumber + 1].CFrame
				camNumber = camNumber + 1
				HouseNum = "House "..tostring(camNumber)
				Label.Text = HouseNum
			end
			wait(0.1)
			arrowClickCooldown = false
		end)
		LArrow.MouseButton1Click:Connect(function()
			if arrowClickCooldown then return end
			arrowClickCooldown = true
			if camNumber == 1 then
				cam.CFrame = camParts[#camParts].CFrame
				camNumber = #camParts
				HouseNum = "House "..tostring(camNumber)
				Label.Text = HouseNum
			else
				cam.CFrame = camParts[camNumber - 1].CFrame
				camNumber = camNumber - 1
				HouseNum = "House "..tostring(camNumber)
				Label.Text = HouseNum
			end
			wait(0.1)
			arrowClickCooldown = false
		end)
	else
		cam.CameraType = Enum.CameraType.Custom
		script.Parent.LeftArrow.Visible = false
		script.Parent.RightArrow.Visible = false
	end
end)

Button.MouseButton1Click:Connect(function()
	if Human.Sit == false then
		cam.CameraType = Enum.CameraType.Custom
		script.Parent.LeftArrow.Parent.Visible = false
		HouseTP:FireServer(HouseNum)
	else
		Warn.Text = "You must be standing!"
		Warn.Visible = true
		wait(3)
		Warn.Visible = false
		Warn.Text = ""
	end
end)
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#2 
local Human = char:WaitForChild("Humanoid")
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