# i can't start a session

**URL:** <https://forums.unrealengine.com/t/i-cant-start-a-session/2046545>\
**Category:** Issues and Bug Reporting\
**Tags:** unreal-editor-for-fortnite, bug-report, fortnite\
**Created:** [September 30, 2024, 7:52pm UTC](https://forums.unrealengine.com/t/i-cant-start-a-session/2046545 "2024-09-30T19:52:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Bil\_game78](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Bil\_game78](https://forums.unrealengine.com/u/Bil_game78)\
**Post date:** [September 30, 2024, 7:52pm UTC](https://forums.unrealengine.com/t/i-cant-start-a-session/2046545/1 "2024-09-30T19:52:48Z")

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### Summary

i can’t start a session

### Please select what you are reporting on:

Unreal Editor for Fortnite

### What Type of Bug are you experiencing?

Other

### Steps to Reproduce

Hello, I have a big problem with one of my uefn maps, suddenly I can no longer launch it and it bugs, when I want to launch a session it tells me: LoadErrors: Error: /EVREST/ **ExternalActors** /EVREST/D/EK/2RVTAOI30XZ1U9AMBH9WOK : Failed import for SceneComponent /EVREST/EVREST.EVREST:PersistentLevel.FortPlaysetRoot\_2147482645.DefaultSceneRoot LoadErrors: Error: /EVREST/ **ExternalActors** /EVREST/D/EL/ZOJTLKMXTMQ8IBA19KOWT0 : Failed import for FortPlaysetRoot /EVREST/EVREST.EVREST:PersistentLevel.FortPlaysetRoot\_2147482645  
several times, can you help me? Thanks in advance

### Expected Result

i can’t start session

### Observed Result

i can’t start session

### Platform(s)

pc

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<div class="post-metadata">

**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 1, 2024, 5:32am UTC](https://forums.unrealengine.com/t/i-cant-start-a-session/2046545/3 "2024-10-01T05:32:18Z")

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hi @Bil_game78 ,  
There was an article about picking out code and translating  
[Asset Validation Issues - Issues and Bug Reporting](https://forums.unrealengine.com/t/asset-validation-issues/817504/14)

So the extracted bits to paste in the Outline window is  
2RVTAOI30XZ1U9AMBH9WOK

ZOJTLKMXTMQ8IBA19KOWT0

This should show the Asset that is failing

Experience shows this is due to project in a prior version for example 29.60

This next command could cause more problems and on do it if you are comfortable

The way the fix this is delete the content of the store in Windows File explorer  
C:\Users%USERPROFILE%\AppData\Local\FortniteGame\Saved\PersistentDownloadDir

to completely rebuild UEFN stores will attempt to build the corrupted store  
READ THE WARNING and if you are not comfortable with advanced troubleshooting dont use this  
if you type something wrongly you could do severe damage always use copy/paste commands

[31.20 UEFN Fix Validation by clearing temporary store](https://forums.unrealengine.com/t/31-20-uefn-fix-validation-error-pop-up-wont-run/2024338/2)