Cant connect to the EA Servers after update for three days already

Are you saying you can't connect to the main menu when first loading in to FC 27? If so, as a test, try switching your connection to use a mobile hotspot. Let me know if that connects or not. Again, this is only a test and not meant to be a permanent solution if it works.

it is at the loading screen already coulnt connect. 

When exactly are you unable to connect? Is it when only trying to access Ultimate Team? If so, try using the web/companion app to delete your squads. Not the players, just the squads. Then, create an empty squad and try loading int o UT again.

i also tried your recommendation and advice. However, it is not successful. Please help to solve the issue. Many thanks

I am playing on PS5. Ultimate team and also other online area. i could barely only able to play offline. 

Hi there. Thanks for reaching out. Which platform are you playing on? Also, are you unable to connect to the main menu or are you getting this error only when trying to access Ultimate Team?

I also recommend you try the suggestions in this article for connection troubleshooting.