In order for Touch Interface Designer to work best, you need to specify the input mode for the player controller, Game And UI. If you use UI Only, the inputs will be detected but will not be passed to your different classes. If you use Game Only, the inputs will not be detected by the touch interface which is a widget like the others.
If you’re creating a project with the unreal engine 5.3, you may need to change the input mode. From some tests, setting the input mode to UI seems to work.
