Interesting, but I was able to get the "Attention! Too many players on the active roster" when the first season ended. As can be seen from the roster itself, the case just isn't so. I would save the game and send you the file to examine, however I can't access anything else than by pressing F# buttons to view different things I usually can as well. However pressing anything else doesn't have any effect.
Any suggestions on what to do?
Here's the image on how the game looks like...
