Epic Launcher FAB Library Broken – All Downloads Failing

I am currently unable to download or install any assets or plugins from my FAB Library inside the Epic Games Launcher.

What Happens

  • Any download attempt from FAB fails.

  • I cannot install the Unreal Engine 5.7 plugin for Fab.

  • I also cannot install other plugins, such as WCG Plugin.

  • Even attempting to install an engine version results in similar failures.

Error Messages Received

  1. Unreal Engine 5.7 plugin for Fab

    • Status: Download failed

    • Message:

      “An unknown error has occurred during installation of Unreal Engine 5.7 plugin for Fab.”

    • Error Code: FAB-FAB001

  2. WCG Plugin

    • Status: Install failed

    • Message:

      “Could not load installation information. Please check if the installation has been removed or existed on an external drive.”

    • Error Code: IS-0009

  3. WHAT I HAVE TRIED ALREADY

    1. I followed the recommended troubleshooting steps, but the issue persists. https://www.epicgames.com/help/en-US/epic-games-store-c-202300000001639/error-messages-c-202300000001736/is-0007-or-is-0009-manifest-failed-to-load-a202300000013120
    2. I fully uninstalled the Epic Games Launcher and removed all remaining launcher-related folders to ensure a clean reinstall. After reinstalling the launcher, the issue still persists, and downloads continue to fail.
    3. Lastly, I have never encountered this issue prior to now.
  4. ADDITIONAL HELP REQUESTED

    If anyone has experienced a similar issue or has any suggestions on what else I could try to resolve this problem, I would greatly appreciate your advice.