# Error when trying to open a new session in UEFN

**URL:** <https://forums.unrealengine.com/t/error-when-trying-to-open-a-new-session-in-uefn/834839>\
**Category:** Issues and Bug Reporting\
**Tags:** unreal-editor-for-fortnite, editor, question, fortnite\
**Created:** [March 30, 2023, 11:40pm UTC](https://forums.unrealengine.com/t/error-when-trying-to-open-a-new-session-in-uefn/834839 "2023-03-30T23:40:58Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![HalcyonKnight96](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/halcyonknight96/32/924312_2.png) [@HalcyonKnight96](https://forums.unrealengine.com/u/HalcyonKnight96)\
**Post date:** [March 31, 2023, 12:55am UTC](https://forums.unrealengine.com/t/error-when-trying-to-open-a-new-session-in-uefn/834839/2 "2023-03-31T00:55:33Z")

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Hi @ElJuanSexd your output log should show some .uasset names above the errors that should point to the actors causing the issues. Copy the .uasset file name into the outliner to find the issue. As an example: [When importing buildings directly from fortnite in flying man mode the project does not pass validation and does not start giving error messages - #5 by HalcyonKnight96](https://forums.unrealengine.com/t/when-importing-buildings-directly-from-fortnite-in-flying-man-mode-the-project-does-not-pass-validation-and-does-not-start-giving-error-messages/832301/5)

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