Re: Getting a sign in change occurred while playing.

This might be a problem with your connections to the online server. The best thing to do is check this article out: https://help.ea.com/en-us/help/faq/connection-troubleshooting-basic/

If this does not work, you may need to exit and restart the game to access your new content. If that doesn't work, try turning off and restarting your device.