Presenting the Load Screen
Loading screens will only be presented when running your game in a packaged game or in standalone mode (it will not show when running in editor window modes!). To make it work you just need to create a user widget to use
as a loading screen and call the provided node to add/remove it from the ALSLoadingScreenSubsystem
Important!: Loading screens added through the Loading ScreenSubsystem are NOT added as regular widget, because regular widget gets deleted once the level is destroyed and may be unreliable while transitions between levels. They use a custom system that ONLY WORKS IN STANDALONE / PACKAGET PROJECTS and NOT IN EDITOR!