Plugin doesn't load with Paper 301 (latest build currently)

[Gladorme]

Describe the bug EWG 8.1.21 build on Paper 301 build doesn't work. Paper crashs then stop the server. It may or may not work on other build version of Paper (I didn't test other EWG or Paper builds)

To Reproduce Steps to reproduce the behavior:

1. Install EWG 8.1.21 on Paper 301
2. Start server
3. Wait for the world to generate

Expected behavior Server and plugin working fine

Screenshots None, logs : https://pastebin.com/LvgAMR2i

Spigot version (please complete the following information): Paper - Build 301

Additional context I have followed this guide for optimizing the server (don't know if it can break the plugin) : https://www.spigotmc.org/threads/guide-server-optimization%E2%9A%A1.283181/

[jonryf]

Hey! EWG injects an installation patch when a new world is created. Your server seems to freeze for a long time because of the work the plugin is doing, which is expected behavior. If the server times out, you can adjust the paper settings to prevent that.

You should also take a second look on the server log, first line:

[15:22:04] [Server thread/INFO]: EpicWorldGenerator finalizes installation. This process takes a few seconds, server might freeze
[15:22:07] [Craft Scheduler Thread - 14/INFO]: Loaded 40 categories (ia_gui.yml)
[15:22:08] [Craft Scheduler Thread - 14/INFO]: [ItemsAdder] Loaded items and stuff in 9375ms
[15:22:14] [Paper Watchdog Thread/ERROR]: --- DO NOT REPORT THIS TO PAPER - THIS IS NOT A BUG OR A CRASH  - git-Paper-301 (MC: 1.15.2) ---
[15:22:14] [Paper Watchdog Thread/ERROR]: The server has not responded for 10 seconds! Creating thread dump