I started up a moded server with some friends. I have run servers before and it was no problem, I got everyone set up and booted into the world. No problems, at least none that I couldn't solve. Except one, the last person to join had the "game crashed whilst rendering overlay" issue. I have gotten past the issue before by simply starting a new installation of the mod pack on forge, but that didn't work this time. Any help is appreciated.