Minecraft and Mod version 🐞
Minecraft 1.21
Fabric 0.16.0
Mod 5.4.1

Description of the crash 💥
Any time I try to setup dialogue, it kicks me out of my game saying:

"Connection Lost
Internal Exception: io.netty.handler.codec.EncoderException: Failed to encode packet 'serverbound/minecraft:custom_payload' (easy_npc:save_dialog_set)"

Steps to reproduce the crash ⚙️

1. Spawn an NPC
2. Add Dialogue
3. Save Dialogue

Expected behavior before the crash ✔️
I expected I would've been able to actually use the dialog system

Mods Enabled:
The mods I'm using can be found in the zip file at https://drive.google.com/file/d/1sTr8DnwA7bRNnxwdEU-P0zMW8ExVAeYD/view?usp=sharing

Thanks for the report, should be fixed with 5.4.2.