ImHex requires a GPU with OpenGL 3.0 support in general. There are releases available (with the -NoGPU suffix) that are software rendered and don't require a GPU, however these can be a lot slower than the GPU accelerated versions.
If possible at all, make ImHex use the dedicated GPU on your system instead of the integrated one (especially Intel HD GPUs are known to cause issues).
This sort of thing drives me round the bend. It's a hex viewer, not a AAA game, why does it need or even care about your GPU. The data visualisation is nice, but there are other tools for that, Gnu Poke springs to mind.