If you are encountering this on Steam, try these steps in order: Verify Integrity of Game Files
The DirectX Runtime redistributable package (June 2010) contains many legacy DirectX files that are no longer included in standard Windows installations. The DirectX redistributable installs legacy runtimes (including D3DX9, D3DX10, D3DX11) that many older games depend on. This is the same as the DX12 that comes built into modern Windows, but a supplemental package of older files.
How To Fix DX11 feature level 10.0 is required to run the engine How to Simplify Tech YouTube• May 7, 2025