How can I set this UI Aspect Ratio to size down in the centre of the screen?

[MaliciousInfo (mal)]

I’m working on a shop for my game but, the shop UI will not stay in the centre of the screen. Observe:

(Properly-sized)

(When I open something like Output)

It shrinks down into the left of the screen, any solutions?

[m0del86]

Try this
“AnchorPoint” : [0.5,0.5]
“Position”: {“UDim2”: [[0.5,0],[0.5,0]]}