Unable to cast Dictionary to TweenInfo?

I was trying to make a repeating and tweening camera using while true do and tweeninfo. The current camera CFrame starts on the first camera and would switch into the second camera every 7 seconds with a tween and also on repeat.

local camera = workspace.CurrentCamera
camera.CameraType = Enum.CameraType.Scriptable

local tweenService = game:GetService("TweenService")

function tween(part1, part2)
	local tweenInfo = TweenInfo.new(5,Enum.EasingStyle.Quad,Enum.EasingDirection.Out)
	local tween1 = tweenService:Create(camera, TweenInfo, {CFrame = part2.CFrame})
	local tween2 = tweenService:Create(camera, TweenInfo, {CFrame = part1.CFrame})
	while true do
		camera.CFrame = part1.CFrame
	
		tween1:Play()
	
		wait(7)
	
		tween2:Play()
		
		wait(7)
	end
end

tween(game.Workspace.Cam1, game.Workspace.Cam2)