thanks for your response. Is there no option where you can set which DirectX the game should be able to run with?
These options are indeed available in project settings, but the game engine doesn't support versions older than Directx11:
If your graphics card doesn't support DirectX11, unfortunately, I don't think it's possible to launch the game.
EDIT: The game currently supports DirectX12, so if your graphics card is compatible with DirectX11 versions but not with the DirectX12 version, I understand that this may trigger this error.
If you wish, I can release the game with DirectX11 support if that helps.