Can you upload your save file somewhere so I can take a look at it? I should be able to see what the error is and hopefully be able to fix it. You can find it in the folder C:\Users\(your username)\AppData\LocalLow\Lazy Dog Software\LCS on Windows.
I have a fix that will allow the save file to be loaded again although I still haven't figured out the root cause of the problem - it looks like one of your characters has a reference in their subordinate list to another character who no longer exists, but it's hard to tell from the log when/why exactly that happened. I should have a build up later today.