[Major] UEFN Won't Launch after newest patch still- Stuck on "90% Logging In" running for over 10 hours

Summary

I tried to launch UEFN yesterday and it would always get stuck at 90% logging in. I left my computer on with uefn stuck at that for OVER 10 HOURS FROM 2 AM to 12 PM and IT STILL DIDNT LAUNCH. I tried updating with the latest patch to supposedly “fix” the launch issues BUT IT DIDNT CHANGE ANYTHING. Ive uninstalled and reinstalled and verified files multiple times but it just wont work. This is REALLY HINDERING MY WORK AND I NEED THIS FIXED ASAP.

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Steps to Reproduce

Launch UEFN- I haven’t seen anyone else report this issue.

Expected Result

UEFN Launches

Observed Result

UEFN gets stuck at 90% Logging In

Platform(s)

PC

hi @Atom_XC ,
Right-click the Epic Games Launcher (EPGL) and select Properties ->General ->Advanced
Epic Games Launcher (EPGL) must be started in “Run As Administrator” see picture below


Open EPGL using updated shortcut
Allow the Download of 8th June 2025 19:36 UTC 3.7GB to take place
Then Verify
How to verify

Restart PC

Restart EPGL using the updated shortcut. with “Run As Administrator”
Launch UEFN

Did not work. Still stuck at “90% - Logging In…”

hi @Atom_XC ,
check your directory and delete content of
C:\Users%username%\AppData\Local\UnrealEditorFortnite\saved"."
C:\Users%username%\AppData\Local\UnrealEditorFortnite\Intermediate*."
these are temporary files.
try launching again
if not its an account problem
try launching Fortnite itself

It still didn’t work. It’s not an account problem because I’ve tested it with two accounts, and it doesn’t work for either of them. And Fortnite itself launches absolutely fine. This issue only started happening yesterday after the Ch6 S3 update.

I SOLVED IT! Using a Clean Boot of my PC I figured out actually that a software on my computer was blocking UEFN for some odd reason. If anyone else ever has this issue take a look at this website and you should be able to fix it!
How to perform a clean boot in Windows - Microsoft Support

1 Like

FORT-920767 has been ‘Closed’. The issue reported is not caused by a bug in the tool.