Seems to be an XNA error, you could try to reinstall the Microsoft Game XNA 4.0 redist from Microsoft's website. Here: https://www.microsoft.com/en-au/download/details.aspx?id=20914same problem. Ran update as admin - no help
It could unfortunately be that your graphics card (Integrated or dedicated, depends) can't support FreeSO's requirement of OpenGL 3.0. Or something along those lines.......update: It didn't work, I'm stumped, wish I could play.