Describe the bug

I use Item Adder in my server and when I run an Emote, item disappears from my hand.

So I update my protocol lib (it is a dependency to Item Adder) "ProtocolLib 4.8.0"

In this case server kick me and write me this error: https://pastebin.com/syQewkju
And when I try to join in server, it kick me: https://i.imgur.com/24G3Xix.png

at this point I removed one plugin at a time and when Model Engine (all version) is disable, I can join in my server and
Item Adder Emote works without bug. (but I need Model Engine in my server)

So I tryed to update Protocol lib to 5.0.0 snapshot and in this case I can join in server but Emote are bugged and I have this error from Protocol lib: https://pastebin.com/NKNZR1vf

When I try in this case to run an Emote I have this error: https://pastebin.com/Hexb83n1

Server Info
-1.18.2

without plugin "ModelEgine" I dont have this problem