The Plugin in Purpur 1.20.4's warning

[Nanaloveyuki]

I don't know what happend is it, This is my server configs:
Windows Server 2019
Java: zulu java21
Mem: Max 6.9G to Server(My server is 8G mem)
Server: purpur 1.20.4

My English not good, so it's maybe have some wrong of word.
This plugin config file is default
This plugin can run in this version, but it always warn to me.
I download it in Spigot Website
It very interesting in my server, I love this plugin, but its always warn to me
Please help me, Thanks!