Forge version (Client and server) Forge-47.3.0
Minecraft Version: 1.20.1
Avaritia Lite Version: 1.10.2 for Forge

I originally discovered this error while testing a WIP modpack, and it appears to only occur on a rare case when attempting to connect to a server.
I assume it has something to do with the client startup, as if the error is occuring, then no matter how many times you try to reconnect, the same error appears, yet restarting it seems to only have a chance of it occuring when you try to connect.

The disconnect error is as follows:
Internal Exception: java.lang.NullPointerException: Cannot invoke "net.minecraft.nbt.CompoundTag.m_128459_(String)" because "nbt" is null

I have confirmed that this error can occur even in an installation with only Avaritia lite and no other mods installed, as well as in a server with a bunch of other mods, it makes no apparent difference.

The following is the latest.log from the attempt to join that resulted in the error, for whatever help that may provide in figuring out whats causing this.
latest.log

I have the same issue, it seems to be releated to the longbow arrow entity.