Yep, that's the lwjgl OpenGL error. I need to figure out how I can handle it, because there appears to be a resolution, but I'm not sure exactly what causes the issue and how to detect it ahead of time. I'm going to try a workaround and see if it works in the general case.
Here's the description of the error - it's a bug in lwjgl, as far as I can tell: https://github.com/libgdx/libgdx/issues/997