Apparently, the Churchill Downs Road to the Roses game had some hiccups on their site yesterday. Many that logged on and tried to update their stable were unable to do so. It had nothing to do with the individual leagues but instead the Churchill/Twin Spires site itself.
Anyway, it looks like things are back to normal as I was able to log on this morning, something I wasn't able to do yesterday.
If you can't log into your account, contact Twin Spires; it's a problem on their end.