Widget class is replaced with a placeholder class when reloaded

After reloading this project the widget assigned to the 3D widget will be replaced with a Class called "PLACEHOLDER-CLASS PlayerHealth" PlayerHealth is the original name of the class that is supposed to be applied.

1. Down load attached project
2. Open Project
3. Open SpaceShip_Pawn
   Content > Elpis Defender > Blueprints > SpaceShip_Pawn
4. Go to the Viewport of the SpaceShip_Pawn blueprint
5. Scroll out until you can see the ship
6. Select HpWidget from the components panel
7. Notice in the details panel under UI that it says "PLACEHOLDER-CLASS_PlayerHealth_Widget_C_8" instead of just PlayerHealth_Widget (this is the original widget applied)