Fortnite on the PlayStation 4 does not allow cross-console play, this much we know. However a bigger story has been developing since the release of the Nintendo Switch version earlier today: you can’t log in to the game if you’ve previously linked your Epic Account with the PlayStation Network. Well, you can, but you’ll need to create a new account and start over.
The reason for this is unclear: it could be security, purchase protection, or simply Sony being an ass. Either way, this is creating a social media sh*t storm on an unprecedented scale, so something will have to change. You can currently log in to the Switch version if you’ve previously played on Xbox, PC, or mobile, so this does appear to be a PlayStation specific problem.
Sort it out, Sony.