Incompatibility with Multiverse Core

[tastybento]

Description

Describe the bug

When starting the server with Multiverse the console gives a big error and the server crashes.

Steps to reproduce the behavior

1. Install Multiverse, WorldGeneratorAPI, Boxed.
2. Start server

Log: https://pastebin.com/ashhfAVu

Expected behavior

Work with Multiverse, if possible.

Screenshots and videos (Optional)

Environment

Output of /bbox version (Mandatory)

> bbox v
[15:05:53 INFO]: Running PAPER 1.16.5.
[15:05:53 INFO]: BentoBox version: 1.16.1-SNAPSHOT-LOCAL
[15:05:53 INFO]: Database: JSON
[15:05:53 INFO]: Loaded Game Worlds:
[15:05:53 INFO]: boxed_world (Boxed): Overworld, Nether*, The End*
[15:05:53 INFO]: oneblock_world (OneBlock): Overworld, Nether*
[15:05:53 INFO]: Loaded Addons:
[15:05:53 INFO]: AOneBlock 1.5.4-SNAPSHOT-LOCAL (ENABLED)
[15:05:53 INFO]: Border 3.0.0 (ENABLED)
[15:05:53 INFO]: Boxed 1.0.2-SNAPSHOT-LOCAL (ENABLED)
[15:05:53 INFO]: InvSwitcher 1.9.1-SNAPSHOT-LOCAL (ENABLED)
[15:05:53 INFO]: TwerkingForTrees 1.4.1 (ENABLED)
> 

Plugins (Optional)

[15:06:07 INFO]: Plugins (6): BentoBox, Essentials, LuckPerms, PlaceholderAPI*, WorldBorderAPI, WorldGeneratorApi, Multiverse

Additional context (Optional)