Failed to verify username

[vector4new]

Operating System

No response

Version of PollyMC

PollyMC 8.0

Version of Qt

Qt 6.6.0

Description of bug

I use an authlib-injector account (Username being bodoEnd90) to be able to join servers; However every time I try to join one, it shows an error message saying "Failed to verify username"

Steps to reproduce

• Create an authlib-injector account
• Get a server IP
• Attempt to join the server

If the same error message pops up, it has something to do with the instance itself, otherwise I've fucked it up somehow.

Suspected cause

No response

This issue is unique

• I have searched the issue tracker and did not find an issue describing my bug.

[ItsDragonaire]

With offline accounts, you can only join offline or cracked servers... This error generally occurs when you try joining a premium server via an offline account. Since the premium server- requires authentication from microsoft, and your username being from an offline account won't match with the presented UUID in the microsoft server, hence it not being able to verify.
Rest if I am mistaken, please feel free to correct me.