This issue occurred on FIFA 15 XBOX 360 version

The fifa 15 coins issue is that FIFA fans cannot update their squads. Everything goes smoothly including the connection when one begins to play the game. But issue happens on the latest squad. When someone wants to download a new squad, the game always crashes and completely freezes when it is close to complete that he has to turn it off.
Beside, there are other FIFA fans saying that the same issue happened when they wanted to download the latest squads or if they tried to get into kick off mode their game freezes.EA announces that they are now investigating the issue and apologize for the inconvenience. Namely, there are no official solutions provided so far, so you’d better not click any links saying about solutions or asking for your account logging details.
The links might be spam phisher cheap fut 15 coins websites which are unsecure for your account and you might get you account hacked. What you can do now is waiting for the official solution since the investigation is undergoing already or you can keep on playing you FIFA 15 with your origin squad.