Hey! It is definitely possible that your graphics card doesn't support the version of DirectX that MiniMeters needs. I'm curious if it is indeed that or something on my end. If you could get your dxdiag and send it to contact@minimeters.app that might help me understand what is happening.
In the meantime, you can switch to OpenGL by holding Shift while launching MiniMeters and selecting OpenGL. Let me know if that helps.