Comment by cstdr

Did you even read what I wrote? It did not work. Apple even has an FAQ page for that error (without any useful solution). The suggestion to create an account via Apple Music app is useless since all it does is create an account which must be migrated via browser first (with the same problem). You can also find large threads on Reddit about the problem. Of course the availability of such a sign-up flow suggests it should be possibly, but having it broken for months is not a good look.