Fortnite continues to attract large numbers of players, but with it being an online game, errors are bound to occur. The latest one plaguing members of the community is the Fortnite EU-FA-O error.
Here's all the information we currently have on the Fortnite EU-FA-O error.
What is the Fortnite EU-FA-O Error?
From what we can tell, the the Fortnite EU-FA-O error's cause lies entirely on developer Epic Games' side. Simultaneously, it hasn't provided a Fortnite EU-FA-O error fix as of yet.
There still are a couple of things you can do which might end up working as a Fortnite EU-FA-O error fix. Completely exiting the Epic Games Launcher and restarting it would be a good place to begin. Perhaps even try running it in administrator mode, by right clicking on its icon and choosing the "Run as Administrator" option.
The Fortnite EU-FA-O error, seems to be able to also extend to other games in the Epic Games Launcher. A user on Reddit claims to have fixed their copy of Metro Exodus not starting by simply verifying the game files. You can do so by selecting the first option after clicking on the small cog next to the game's name in the launcher.
If none of these fixes work, however, it looks like the only thing we can do is wait for an official fix for the Fortnite EU-FA-O error from Epic Games.