hey friend! check the SA thread
I've asked around and your error seems pretty unique, but hopefully can be fixed with a reinstall. From what I can tell, it's a turn generation crash. If it's on multiple servers, it's caused by either compatibility or a corrupt install, not by the game's files.
If you can't restart the servers and it defaults to a new game, that means either you didn't put the ftherlnd file back into the game directory (ftherlnd files contain the game state) or the ftherlnd files are corrupt. You'll also want the .trn files, but I'm not sure if they're necessary or not.
I would back up your games, maps and mods, and uninstall, delete, and reinstall the game. If it were just one game that crashed I would say it would be a problem with that game, but more than one means it's a problem with your install.