The error code 4975 occurs when linking a Steam account to an EA account while launching an EA game through Steam. This error indicates that EA's authentication servers have rejected the linking request due to unmet security or eligibility requirements.
EA's authentication tokens can expire or become mismatched with the current Steam session if not recently refreshed, causing the servers to reject the linking request due to an invalid token.
No specific solution provided in the given text.
Author's summary: Fix EA error 4975 by checking account settings.