Playstation 5, can't login

Hello all, please help with this issue.
On Playstation 5 I used FIFA 22 for years without problems. Now I just purchased the FC25 and can't login to my account.

On Playstation5 I have a separate account for me and my son. The son account is defined in PS settings as a "child account" of mine. On ea.com we also have separate accounts but not defined as parent-child (and I would like to keep it that way).

On ea.com settings I unlinked my ea.com account from my Playstation account.
On ea.com settings I linked my son's ea.com account to his Playstation account.

When logging in from the site everything seems ok.
When logging in from the Playstation to play it gives an error message: "Unable to Login, We cannot complete this action at this time. If you need assistance, please reference help.ea.com or answers.ea.com."

Any ideas?