UEFN Error when trying to edit Widget Blueprints or Materials

paxion
Mon, 02 Feb 2026 12:26:30 +0000
Issues and Bug Reporting

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

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7 posts - 3 participants