Cannot log in Stuck in loop both in game and in launcher

@Silvaze64  Does your password contain special characters?  The launcher doesn't respond well to those, and if this might be the issue, the only fix is to remove those characters.

Please also let me know whether you can sign into the Store or Exchange, and to other EA sites, with the username and password you're trying to use for Sims 3.  And let me know if you've recently changed the email address associated with your EA account as well.