Wurst version:7.48.2
Minecraft version:1.21.5
Steps to reproduce:
1. Launch Minecraft 1.21.5 using Fabric Loader 0.16.14 with ViaFabricPlus 4.1.3 installed (along with other mods listed in the provided error log, as a conflict might be involved).
2. Attempt to join the server "LuckyVN NetWork".
3. The game disconnects during the connection process, and a network protocol error report is generated with a `java.lang.NullPointerException` originating from `com.viaversion.nbt.stringified.TagStringWriter`. **Observed behavior:** The game client disconnects from the server with a "Packet handling error". The client log shows a `java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "tag" is null` within ViaVersion's NBT handling code, specifically when `TagStringWriter` attempts to process a tag.
