"There was an error processing the credentials from the external login system" error
This error message appears when you try to log in to Epic Games using a Microsoft account without an Xbox Profile.
To resolve the error, you will need to create an Xbox profile by following these steps:
- In a web browser, go to: www.xbox.com
- Sign in with your email address.
- Follow the on-screen instructions to complete the setup of your Xbox account
- Reattempt to log in to Epic Games.
Note: If you already have an Xbox profile and you're still experiencing the issue, make sure you are logged into the correct Xbox profile. This Microsoft article may help: Find your Microsoft account email address