An error occurred while communicating with the Football Ultimate Team servers.

Hello, 

Whenever I try to make a change in my squad, I receive the following error message:

"An error occurred while communicating with the Football Ultimate Team servers. Please try again." 

I have already tried the following steps but the problem persists: 

Tested with a different internet connection,
Created a new squad,
Reinstalled the game ,
Attempted changes via Web App and Companion App
None of these worked. 

I have noticed that the issue only happens with one specific player: Gyökeres. Regardless of whether I put him in the starting XI, reserves, or substitutes, I cannot add him to my squad.  Could you please check this issue? I don’t want to sell this player, I would like to use him.