How to Fix "Something Went Wrong" or "Invalid Client" Error When Logging into Fortnite on Android

These errors can occur due to using an unofficial or outdated version of the Epic Games store app. To fix this issue, uninstall your current version of the Epic Games store app and download the Epic Games store app directly from the official website at https://www.fortnite.com/mobile/android?lang=en-US (S'ouvre dans un nouvel onglet)

If the issue persists, please try the following steps to switch DNS, as outlined in this article for Android users: How do I switch to a public DNS to strengthen my connection?