Now I understand what is happening here, I have tried that but without success and I tried to do one thing and it is the following: I created a new empty project (it had no elements) and logged in and as I possibly thought it would happen it gave me the same error, then the The problem of not logging in is not from the project but it could be from Windows or it could be from unreal since normally, as happens with Fortnite, each update comes with problems, there is only one solution and that is to wait for an update from both parties since Windows has had problems too. That’s what we can do, wait for future updates and talk to Fortnite so they can check if the problem comes from them.