# UEFN session not starting after the update (Failed to create module version) **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** fortnite-creative, unreal-editor-for-fortnite, bug-report, editor, fortnite\ **Created:** [October 1, 2024, 5:59pm UTC](https://forums.unrealengine.com/t/uefn-session-not-starting-after-the-update-failed-to-create-module-version/2048232 "2024-10-01T17:59:40Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![Jimbohalo10](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jimbohalo10/32/961440_2.png) [@Jimbohalo10](https://forums.unrealengine.com/u/Jimbohalo10)\ **Post date:** [October 2, 2024, 1:25pm UTC](https://forums.unrealengine.com/t/uefn-session-not-starting-after-the-update-failed-to-create-module-version/2048232/4 "2024-10-02T13:25:47Z")
Hi @Arsi , @Flak , > LogValkyrieSummary: Creating Module Version > LogValkyrieSyncProject: Error: CreateModuleVersion error: Failure ErrorCode=errors.com.epicgames.pre-processing.failed, Message= **MODULE VALIDATION FAILED** (job f65333e8-8f15-4929-9644-1d7248930e5a): > Failed downloading the source assets for job, Raw={ The answer is was posted before in [How can I fix “Module Validation Failed”](https://forums.unrealengine.com/t/how-can-i-fix-module-validation-failed/1176251) and [Verify your UEFN installation on Windows 11 using Epic Games Launcher as “Run Administrator”](https://forums.unrealengine.com/t/urc-exe-and-urc-dll-get-flagged-as-malware-from-microsoft-defender/1802519/5) The problem concerns Windows 11 Extended Security blocking parts of the UEFN installation update. This seems to happen on Windows 11 and most UEFN updates since 30.00. Most problems with UEFN and Windows 11 can be fixed by Verify of UEFN --- _[View the full topic](https://forums.unrealengine.com/t/uefn-session-not-starting-after-the-update-failed-to-create-module-version/2048232)._