EC-MNF-01 appears when the launcher cannot parse or download a game manifest — corrupted cache, VPN interference, or disk issues.
Usually client-sideUpdated 2026-06-12
EC-MNF-01 during install
Pause VPN, clear the launcher web cache, then restart the download from Library.
How to fix step by step
- 1Free disk space.
- 2Disable VPN.
- 3Clear Epic Launcher web cache.
- 4Run launcher as administrator.
- 5Verify game files if partially installed.
- 6Reinstall the Epic Games Launcher.
How EC-MNF-01 differs from related codes
- Error MD-DL-0: Epic Games Launcher could not download the installation package in time — Error MD-DL-0. (usually client-side)
- Error AS-3: The Epic Games Launcher could not connect to Epic services or complete authentication. (server or client)
- Error LS-0013: Epic Games login services failed with LS-0013. (server or client)