Minecraft version: 1.21.1, but the problem persists in 1.21.4 as well.

MaLiLib version: 0.21.1-0.21.7 (modrinth)

Litematica version: 1.21.1-0.19.57

Fabric Loader version: 0.16.10

When joining a specific server, Minecraft crashes. If Litematica is disabled, the server can be joined without problems. Grok told me that the problem is due to the absence of the Nether, and Litematica is trying to access it. Additionally, Litematica or the Minecraft client is trying to access the player entity, which does not exist at that moment (is null). I hope this helps.

Game log: mclo.gs / Github gist

Crash log: mclo.gs / Github gist

bug was fixed in 1.21.4-0.21.3-sakura.1