Does it mean that you have it for another level where the HUD worked?
Game Mode is tied to a level - so it might be enough to assign a Game Mode to the level.
Essentially: it’s the Game Mode that will create the HUD blueprint. If the level is not using a Game Mode, you can’t create widgets there as the HUD does not exist.
- either create a widget in another blueprint if you do not care for the HUD class
- or have the Game Mode create HUD for you, but the level must be using said Game Mode