authlib-injector crashes in Minecraft 22w17a

[KatieFrogs]

Operating System

Linux

Description of bug

Minecraft crashes when opening a world in 22w17a.

In singleplayer, game exists with code 255 with the following error message:

com.mojang.authlib.exceptions.MinecraftClientException: Failed to read value Not found

Joining a multiplayer server, the game does not crash, but a message is shown instead

Failed to connect to the server
Failed to read value Not found

The crash does not happen in MultiMC, only UltimMC.

Logs:
UltimMC-0.log
instance.log
authlib-injector.log

Steps to reproduce

1. Install UltimMC (in a clean folder)
2. Create a new instance for Minecraft snapshot 22w17a (or update an existing one)
3. Open the instance, then create a new world, open an existing world, or join an offline mode server
4. Wait for it to load, the crash happens when the loading reaches 100%

Suspected cause

No response

This issue is unique

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

[hapaxant]

I wrote a small mod to workaround this issue for now: https://github.com/hapaxant/UltimNotFound