You don't need to guess. Use these two definitive methods.

If you are coding a game or engine targeting FL 11_0, you lose access to:

Before troubleshooting, check if your graphics card (GPU) physically supports these requirements: Run dxdiag Windows Key + R , and hit Enter. Check Display Tab : Look for the "Feature Levels" section under the : If you see

. It essentially means your system's graphics capabilities don't match what the game needs to render its 3D environment. Microsoft Learn What the technical terms mean D3D11 (Direct3D 11):