unable to get auth token

Summary

LogFab: Error: User auth token is invalid - unable to get auth token

What type of bug are you experiencing?

Plugins

Steps to Reproduce

When opening the Fab plugin in UE, it shows ‘Oops, something went wrong.’ Then, the output log shows ‘unable to get auth token.’

Expected Result

I have deleted the cache files, cleared the registry, changed the language, switched accounts, change the UE version, and used a VPN, but the issue still persists.

Observed Result

LogFab: Error: User auth token is invalid - unable to get auth token

Platform

UE 5.5.3, UE 5.3.2

Operating System

Windows 11