Getting "Unable to cast double UDim2" error with tweening UI?

So I'm tweening a basic frame from one position to another, and I get a UDim2 error, here is an example

:ServerSided Script, starter gui

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.BasicFrame:TweenPosition(0.557, 0,0.5, 0)
end)

The UI is not in a folder, nor done in an odd way, and it prints out

'Unable to cast double UDim2' so I tried another tweening method

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.BasicFrame:TweenPosition(0.557, 0,0.5, 0, "InOut", "Quint", 1)
end)

And it prints 'Unable to cast value to function'. I used the same exact method with many frames and it works fine, but this for some reason just doesn't, do you have an idea?

try using tweenservice instead

Hello your method is not working because you are not giving a UDim2 value.

here is what your code should look like:

script.Parent.MouseButton1Click:Connect(function()
    script.Parent.Parent.BasicFrame:TweenPosition(UDim2.new(0.557,0,0.5,0),Enum.EasingDirection.InOut,Enum.EasingStyle.Quint,1)
end)

You may find more info here; https://developer.roblox.com/en-us/api-reference/function/GuiObject/TweenPosition

As Gameplayer365247v2 said you can use tween service here is what the code would look like:

script.Parent.MouseButton1Click:Connect(function()
game:service('TweenService'):Create(script.Parent.Parent.BasicFrame,TweenInfo.new(1,Enum.EasingStyle.Quint,Enum.EasingDirection.InOut),{Position=UDim2.new(0.557,0,0.5,0)}):Play()
end)

You wrote UDIM2(aka the GUI element's position) as x,y,x,y. You can't just do that because the script expects a specific value, which is UDIM2. Let's say you have a part and you try to set it's position like this:

part.Position = 5,2,6

This is not possible. Because it expects a Vector3 value. Like this:

part.Position = Vector3.new(5,2,6)

This is similar to UDIM2.

Instead of saying

Frame.Position = 0.557, 0,0.5, 0

You're going to have to say

Frame.Position = UDim2.new(0.557, 0,0.5, 0)

To apply it to your scripts:

--// ServerSided script
script.Parent.MouseButton1Click:Connect(function()
    script.Parent.Parent.BasicFrame:TweenPosition(UDim2.new(0.557, 0,0.5, 0))
end)

--// ClientSided script
script.Parent.MouseButton1Click:Connect(function()
    script.Parent.Parent.BasicFrame:TweenPosition(UDim2.new(0.557, 0,0.5, 0), "InOut", "Quint", 1)
end)

Hope you learned something!