Absolutely not. I take pride in making sure that all saves remain functional at all times. You've got something else going on. For just $8.99 via Steam, I will happily troubleshoot it for you!Loading any of my old save games causes a traceback. Are old save games broken? I would expect the OP to say it, but I didn't see anything, or anything obvious when searching for "save" in recent posts.
Jk, but I can't help you if you don't supply the actual error info.