Options menu buttons don't work after packaging

My options menu buttons work exactly as expected when clicked in the editor viewport, but don’t work when pressed in the packaged game. The text on the axis inversion buttons update and the return button works, but that’s it. Any idea how to fix this?

Does setting the Specific Player (I believe it’s Get Player Controller) do anything? Or is it also the same error?

Yeah, that fixed it. I got the resolution buttons working and added a functional toggle fullscreen button, but the mouse axis inversions still don’t work after packaging. They work perfectly in editor, but once packaged, the text updates as normal while having no effect on actual aiming in game. Any what’s causing this problem.