Could not authenticate with Lore servers

Development Programming & Scripting
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1

I keep having this error while trying to connect to lore controll:

Connection Error: Could not authenticate with Lore servers because the login token could not be validated.
Unable to connect to urc-uefn.live.ucs.on.epicgames.com: Not authorized to access repository | NotAuthorized(Traced { inner: NotAuthorized, trace: Trace { locations: [Location { file: “lore-transport\src\error.rs”, line: 21, column: 46, context: None }], overflow: false } })
Unable to connect to urc-uefn.live.ucs.on.epicgames.com

2

Are you logged into the editor? Could you share your full logs?

3

Hi Venom,
Any luck solving the issue ?

4

Yes, had to delete some cache and some other UEFN folders

5

I’m experiencing the exact same issue described in this thread and in “Lore/Revision Control broken on ALL projects after a crash”. Posting my details in case it helps narrow down the root cause.

Project ID: 865a4154-4c72-450e-a9d2-7bd8f70141be

Errors observed (repeating continuously):

  • “Version control is disabled.”
  • “Connection Error: Could not access the Lore project. This could be related to connection or authorization. Check the logs for more details.”
  • Failed to get information from remote: Not authorized to access repository | NotAuthorized(Traced { inner: NotAuthorized, trace: Trace { locations: [Location { file: “lore-transport\src\error.rs”, line: 21, column: 46, context: None }], overflow: false } })
  • “Could not find project 865a4154-4c72-450e-a9d2-7bd8f70141be”
  • When trying to launch a session: “Cannot play — Source files could not be loaded.”

Steps already tried without success:

  • Fully closing and reopening UEFN and the Epic Games Launcher
  • Signing out and back into my Epic account
  • Restarting the PC
  • Checking for VPN/firewall interference (none found)
  • Confirmed Epic Games services show no reported outage on status.epicgames.com

This matches the pattern described by other users here — looks like a server-side issue with the Lore backend rather than something fixable client-side. Any update on this would be appreciated.