Why i cant link ubisoft to epic games

Hello I made a pre-order of the game, and when I click on the ubisoft login required this error pops up I looked on the Internet how this works for everyone, that a browser window opens and everything is easily done, but I immediately get an error. I did everything that I was told by the epic game support service, but nothing helps, please tell me what the problem is and how should I be?

This forum is for Unreal Engine, this is not the place to post questions on that topic.