I cant buy anything for real money in game

Hey there. Please try this workaround and let me know if it helps.

1. After tapping OK to close the error, minimise the game (press the Home button).
2. Open your phone’s Store app (App Store / Google Play) and check:
   • Is it loading properly?
   • Are you signed in to the correct account?
3. Go back to FC Mobile and try again.

Alternatively, check if you can complete the purchase on the webstore.