Describe the bug
Whenever joining the server, the player is disconnected immediately.

To Reproduce
Steps to reproduce the behavior:

1. Install mod
2. Attempt to join server

Expected behavior
Player should be able to join just fine

Screenshots

Fabric version information (please complete the following information):

• Minecraft: [1.16.5]
• Fabric Launcher: [0.11.6]
• Fabric API: [0.35.1]
• AntiqueAtlas: [6.0.0]

Tried using XLPackets. Issue still persisted.

An update to this, Pregenerating the nether with Chunky and antiqueAtlas installed seems to cause a huge (289kb) aAtlasTiles.dat (Attached). Deleting the file to reset it fixes the disconnect issue.
aAtlasTiles.zip

During the pregeneration, a large number of nether fortresses are generated. AA tracked those and stored the matching tiles in the file you attached. The problem is that apparently the whole file is transmitted in one packet during login. I guess I need to split that into several packets.