Bug in 1.21.4

[Dianelito]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior: start server 1.21.4

1. perform command '...'
2. Click on '....'
3. See error: https://pastebin.com/TqsbXAK2

Show console logs
Please show the startup logs and logs of the error itself. Pastebin.com is a nice site that allows you to paste large console errors.

[optional] add items.yml and recipes.yml
To reproduce the bug, it could be helpful to see the items and recipes that you're using. Decide yourself if you want to provide this.

[broken1arrow]

It is not a command bug, the plugin fail to start at all. So that is not the actual bug.