Fortnite Down: How To Fix "Battle Buses Are Full" Error Code

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Fortnite's new patch dropped today, but it looks as though fans are struggling to board the Battle Bus and get playing.

A new "That Wasn't Supposed To Happen" error is preventing players from logging in.

Fortnite Down: How To Fix "Battle Buses Are Full" Error Code

Check out the screenshot below, with the error code "match.session_unavailable.402".

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click to enlarge

Uh oh

Luckily, it seems the issue is easy to fix - just make sure your game is updated.

Here's how to do that on all platforms:

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PC

Quit Fortnite, and if an update is available, it'll be downloaded via the Epic Games Store.

PS4/PS5

On Sony consoles, head to your dashboard and highlight Fortnite.

Press the options button, and then "Check for update".

Xbox One/Series S/Series X

On Xbox, head into "My Games and Apps".

From there, check the "Updates" section on the left, and ensure if Fortnite appears that you install it.