Error code 9.0 when trying to sign in

I have the exact same problem.
The in-game support suggested creating a new account as a solution...
It seems several of us have been experiencing this issue in recent days.
Perhaps EA/CG should address it soon...

After 6 days of fighting, I finally got an answer regarding the technical problem with error 9. 
Nobody can help you mate

To summarize:

• - EA forces us to log in using their account. 
• - You can PERMANENTLY overwrite your game data if you ever click "Login" instead of "Import Account" when logging in.
• - NO warning message informs you that you are overwriting your account.
• - EA support says they don't have the capacity to solve the problem.
• - In-game support says they don't have the capacity to solve the problem.
  
  Screw you EA, screw you CG.