# UEFN Error when trying to edit Widget Blueprints or Materials **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** id, slug, open, name\ **Created:** [February 2, 2026, 12:26pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552 "2026-02-02T12:26:30Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![paxion](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/paxion/32/1096598_2.png) [@paxion](https://forums.unrealengine.com/u/paxion)\ **Post date:** [February 2, 2026, 12:26pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/1 "2026-02-02T12:26:31Z")
### Summary When I create a Widget Blueprint (or Materials) and double-click it to open, the editor fails to load. Instead, I get a very long error message (shown in the screenshots), and the editor tab opens completely white, never loads and I also cant tab in. I’ve already tried verifying the files and reinstalling UEFN, but the issue still occurs. ### Please select what you are reporting on: Unreal Editor for Fortnite ### What Type of Bug are you experiencing? Other ### Steps to Reproduce Create a Widget Blueprint or a Material and try to open it ### Expected Result A very long error and white editor tab ### Observed Result A very long error and white editor tab ### Platform(s) PC ### Upload an image ![Screenshot 2026-02-01 235544.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/2/7/a27d05bf0192da7aad3cb03d18f14037bf9a40ee.png) ![Screenshot 2026-02-01 235656.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/e/f/befd581ea19c2a9240eb04697bada14e476a142c.png) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [February 6, 2026, 1:19pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/3 "2026-02-06T13:19:36Z")
Could you send over your logs? > [@How to get your Fortnite logs](https://forums.unrealengine.com/t/how-to-get-your-fortnite-logs/682382): > > At times, we will ask you to send us your logs when you’re having an issue in UEFN. Here is how to do that: UEFN Logs Exit Fortnite. Click on Start or press the Windows Key + R. Type \AppData\Local\UnrealEditorFortnite\Saved\Logs and press Enter. Zip your Logs folder and attach the zip file to your reply. To find UEFN Logs while working in UEFN: Click “Output Log” at the bottom of the window. Click on “Setting” at the top right of the window Click “Open Source Location” Zip your Logs folder… ---
**Author:** ![paxion](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/paxion/32/1096598_2.png) [@paxion](https://forums.unrealengine.com/u/paxion)\ **Post date:** [February 6, 2026, 2:37pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/4 "2026-02-06T14:37:11Z")
[Logs.zip](https://forums.unrealengine.com/uploads/short-url/detaY5d0Fpas7j1huRX6JFXF9nj.zip) (2.3 MB) ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [February 10, 2026, 12:44pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/5 "2026-02-10T12:44:19Z")
Thank you, I sent these over to the team. ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [March 16, 2026, 1:23pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/7 "2026-03-16T13:23:43Z")
Hello, this was reassigned to another team, and they are starting to check into it. ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [April 14, 2026, 1:24pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/8 "2026-04-14T13:24:26Z")
This was sent to another team to try to reproduce. We’ll let you know if we need more information. ---
**Author:** ![paxion](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/paxion/32/1096598_2.png) [@paxion](https://forums.unrealengine.com/u/paxion)\ **Post date:** [April 27, 2026, 4:20pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/9 "2026-04-27T16:20:25Z")
Hi Flak, today I found a way to fix this issue! When this happens and the window is white and cant open it I just right clicked the white window on my taskbar and there is an option called maximize which then opened the window and fixed the issue. ---
**Author:** ![Bug-Reporter](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/bug-reporter/32/997076_2.png) [@Bug-Reporter](https://forums.unrealengine.com/u/Bug-Reporter)\ **Post date:** [June 12, 2026, 4:01pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/10 "2026-06-12T16:01:20Z")
FORT-1052437’s status has changed to ‘Ready for QA’. A member of the QA department is investigating the issue. ---
**Author:** ![system](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/1/3/713c9d3f58553f0de89543d76a8a3a2779dc9fa4.png) [@system](https://forums.unrealengine.com/u/system)\ **Post date:** [August 1, 2026, 12:27pm UTC](https://forums.unrealengine.com/t/uefn-error-when-trying-to-edit-widget-blueprints-or-materials/2696552/11 "2026-08-01T12:27:02Z")
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