We’re aware of an issue causing some UEFN projects to crash when opened. We are working on a solution and will provide an update once this has been resolved. If you’re experiencing this issue now, please try the following:
- Open the Epic Games Launcher.
- Find the UEFN tile in your library.
- Click the three dots below the tile.
- Click on “Manage”
- Slide the button for Additional Command Line Arguments to on.
- Type: -d3d11 in the box.
- Launch UEFN.
- Note: In order to switch back to DirectX 12 you need to delete the command/slide the button to off.