"Your graphics card does not support vertex shaders!" Game is older than GPU

[NimBlemations]

It appear that when I compile the game, it says that my GPU, which is 6 years younger than the game, doesn't support vertex shaders.

I have traced this error to GetCaps from LowLevelGraphicsSDL.cpp returning 0.

It is trying to check if _GLEE_AB_vertex_program is enabled, yet it isn't somehow, why is that? I surely don't know.