# \[42.30\] UEFN closes on launch ("Failed to open descriptor file") – launcher installs Fortnite\_Studio with no components

**URL:** <https://forums.unrealengine.com/t/42-30-uefn-closes-on-launch-failed-to-open-descriptor-file-launcher-installs-fortnite-studio-with-no-components/2839709>\
**Category:** Issues and Bug Reporting\
**Tags:** open, fortnite-creative, unreal-editor-for-fortnite, bug-report, fortnite\
**Created:** [October 12, 2026, 10:52am UTC](https://forums.unrealengine.com/t/42-30-uefn-closes-on-launch-failed-to-open-descriptor-file-launcher-installs-fortnite-studio-with-no-components/2839709 "2026-10-12T10:52:11Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**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 20, 2026, 10:32pm UTC](https://forums.unrealengine.com/t/42-30-uefn-closes-on-launch-failed-to-open-descriptor-file-launcher-installs-fortnite-studio-with-no-components/2839709/8 "2026-10-20T22:32:59Z")

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Hi @wowkill my workaround until Epic officials fix is 42.40 possibly.

[Unable to launch fortnite through UEFN after installing the new EGL or latest update - General / Issues and Bug Reporting - Epic Developer Community Forums](https://forums.unrealengine.com/t/unable-to-launch-fortnite-through-uefn-after-installing-the-new-egl-or-latest-update/2841564/2)

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