Failed load PlugManX-3.x.x

### Error

```
https://mclo.gs/2tj9hBR
```


### Bug Description

Can't load latest PlugManX on Paper. Tested both PlugManX-3.0.2-RC.1 and 3, same error.

### Steps to Reproduce

1. Prepared clean Paper 1.21.8 server
2. Put PlugManX-3.0.2-RC.1 in plugins folder
3. Launched and saw error in console



### Additional Server Info

Server: Paper 1.21.8-60-main@29c8822
