We’ve seen Sony block cross-console multiplayer on PlayStation 4 before and heard unconvincing justifications for it, but never has the issue seemed as petty – and yet also as big – as it has this week.
I’m talking about Nintendo Switch users being blocked from playing Fortnite if trying to log in using an account which has ever played Fortnite on PS4. To reiterate: this isn’t even cross-play, this is simply logging in.
Even if you’ve only played Fortnite once on PS4, and play the majority of your Fortnite on PC or mobile (these platforms are compatible), you will still be blocked from using your account on Switch. Your only option is to create a new account to play.
Source: Eurogamer The PlayStation 4 Fortnite account curse is not "for the players" at all