I tried to load the "Default" league as well as a freshly-downloaded version of an online league, and got this message:
In the online context, I installed OOTP on another computer and tried to download the latest league file from our test online league at FOBL. The latest file was created with a post-patch version on my other computer. When I tried to load it, I got the above error.
I thought the patch was not going to affect old saved leagues. How does this affect online leagues where new owners join after a patch and can't load a league file that isn't the original file?