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How to Fix Epic Games Error II-E1003

Are you getting an Epic Games Error II-E1003 from Fortnite, Rocket League, GTA V, or others?

The error has two types—install failed or launch failed.

If the launch fails, you’ll get this error message, “You must be signed in to launch the game”.

Followed by “Please sign in and try again” along with an error code like LS-0003.

You’ll also see a link that says, “Search our knowledge base to learn more”.

In this guide, you’ll learn how to fix Epic Games error: II-E1003 (install failed or launch failed).

What is Epic Games error II-E1003?

Epic Games error II-E1003 occurs when the Epic Games Launcher fails to download the game files for installation.

It can also happen if the game fails to launch because you’re not signed in.

To better understand the issue, you can check your Epic Games Launcher logs

To do so, you need to enable the Debug Logging box in your Epic Games Launcher settings.

How to Fix Epic Games Error II-E1003

To fix Epic Games Error II-E1003, you can try clearing Epic Games’ cache.

You can also try uninstalling and reinstalling Epic Games or verifying the game files.

Fix 1: Clear Epic Games’ cache

  1. Search for “Run” using the Windows Search Bar and press “Enter”.
  2. Search for “%localappdata%” and select “OK”.
  3. Delete the “EpicGamesLauncher” folder.
  4. Delete the “Epic Games” folder.
  5. Restart your computer and try installing or launching the game again.

Fix 2: Uninstall and reinstall Epic Games

  1. Open the Start menu and select “Settings”.
  2. Apps > Apps & Features > Epic Games Launcher.
  3. Three dots > Uninstall > Follow the on-screen instructions.
  4. Reinstall the Epic Games Launcher.
  5. Open the Epic Games Launcher and try installing or launching the game again.

Fix 3: Verify the game files

  1. Open the Epic Games Launcher and log in.
  2. Select “Library” and find the game that failed to launch.
  3. Click on the three dots on the game.
  4. Select “Manage” followed by “Verify”.
  5. Try launching the game again.

Further reading

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About the author

Lim How Wei

Lim How Wei is the founder of followchain.org, with 8+ years of experience in Social Media Marketing and 4+ years of experience as an active investor in stocks and cryptocurrencies. He has researched, tested, and written thousands of articles ranging from social media platforms to messaging apps.

Lim has been quoted and referenced by major publications and media companies like WikiHow, Fast Company, HuffPost, Vice, New York Post, The Conversation, and many others. One of his articles about the gig economy was quoted by Joe Rogan who hosts The Joe Rogan Experience (arguably the most popular podcast in the world), in the This Past Weekend podcast by Theo Von.

In his free time, Lim plays multiple games like Genshin Impact, League of Legends, Counter-Strike, Hearthstone, RuneScape, and many others. He creates guides, walkthroughs, solutions, and more on games that he plays to help other players with their progression.