I get kicked from server when right clicking on pets.

[lime jungle]

I've been getting everything setup on the server and the one issue I am having is when I try to open the menus for the otter and the gift pet. I get kicked from the server, no crashing from the server or the game, just a disconnection. The reasons vary between:

Internal Exception: javalang.NoClassDefFoundError: con/destroystokyo/paper/event/player /FlayerUseUnknownEntityEvent

and

Connection Lost
Internal Exception: java.net.SocketException: Connection reset

Any idea as to why?

[hardy urchin]

This bug occurs with ModelEngine I believe, it's not due to MCPets

What I remember from it is that it was caused by spigot builds

Instead of spigot, make sure you use PaperSpigot

And I think it should fix it