Apologies no, two different errors.
The games fail to load on all accounts. I'll PM you a couple to play around with. I'll include a copy of the errors for convenience as well.
The other exception error, was something completely different. I put the two rpyc files into the '6.1b/game' folder and started it. I can't imagine it was related to the rpyc files, as it doesn't make sense to me.... But at the Main Menu I pressed "Load" and it went straight to an exception screen. The only button that would at the Main Menu was to start a new game. If I started a new game, I could use URM to load any working save. When in-game, if I right-clicked it'd throw the same error. Once I deleted my persistent store and restarted the game everything on the main menu worked, as right-clicking in-game worked as well. I can't imagine it's related as it just seems so random.