My solution for this case was: Disabled two factor authentication of the next URL: https://accounts.sap.com/ui/protected/profilemanagement (you should wait about 1 hours to sincronized the systems). The structure the URL destionation is: https://depl...
I have had the same error and have created several accounts, I have tried in incognito mode and in several browsers (Chrome, Edge and Opera) with the same error.