[CRITICAL] UEFN editor has issues on clicking

hi All,

UPDATE in post number 21 .

The dev @Fire_Tiger369 has found that stopping Discord from running fixes this problem

:+1: :+1: :+1: :+1:

The latest stable version of Discord for Android is 304.7 (as of November 8, 2025), while the latest version for Windows is 1.0.9214 (as of November 11, 2025).

According to Discord Support, a manual update is needed if your Discord is more than 2 updates behind, as automatic updates do work on more than three updates behind.

My Pc Discord is loaded but not running.

Hopefully, this will be useful to other readers. This addresses the problem with UE 5.7 based on UEFN

  1. My 37.* installation had corrupted, showing up during β€œVerify” of Fortnite/UEFN.
  2. Uninstalled 37.** 38.**
  3. deleted all the C:\Users\%USERNAME%\AppData\Local\
  4. Installed Fortnite 38.10 UEFN
  5. Tried UEFN stalling whilst editing, so this is not the 38.10 installation
  6. Increase my manual page file space to 96GB (96000) from 64GB. Mine stalling slightly
  7. My recommendation is 128 GB (128000), many use a separate SSD and put a Maximum of 512GB
  8. The garbage collector usage has now slowed in the log file, and the response is quicker

Unreal Engine 5.7 production has launched, and people are reporting this problem and crashes.

Many have fixed the problem by adding a 64GB paging file.

Windows 11 appears to be more susceptible to automatic page file issues, which can be resolved by increasing the paging file size.

The size of the memory hardware determines the size of the pagefile.sys

Everything has to run on SSD, and UEFN PROJECTS MUST NOT RUN ON ONDRIVE.

Use of C:\Users\%USERNAME%\Source\repos\Documents\Fortnite Projects is guaranteed to work by Microsoft, as it’s the same as what Visual Studio 2022 uses.

C:\Users\%USERNAME%\OneDrive\Documents\Fortnite Projects WILL CRASH if the OneDrive network fails, and will cause VSCode/Verse to lose to red underline on errors.

Make sure the Unreal Revision Control is NOT using OneDrive

Windows 11, by default, is OneDrive C:\Users\%USERNAME%\OneDrive\Documents

This test used the UEFN Feature example Alpha Tycoon on 38.10

live edit on Android Nintendo Switch 1 Win 11 with 64 GB page file

how to make a 64gb - 64000 manual page file

Running WINVER version 25H2

1 Like