Command cannot be registered

[Xefreh]

I copied the code on the documentation to create a simple command:

package org.example.template;

import io.fairyproject.command.BaseCommand;
import io.fairyproject.command.CommandContext;
import io.fairyproject.command.MessageType;
import io.fairyproject.command.annotation.Arg;
import io.fairyproject.command.annotation.Command;
import io.fairyproject.command.argument.ArgProperty;
import io.fairyproject.container.InjectableComponent;

@InjectableComponent
@Command(value = "testfairy", permissionNode = "fairy.test")
public class TestCommand extends BaseCommand {

    @Arg("name")
    private ArgProperty<String> name;

    @Command("#")
    public void onNoSubCommand(CommandContext sctx) {
        sctx.sendMessage(MessageType.INFO, String.format("Halo %s!", sctx.getProperty(name)));
    }

}

but I got this error:
2024-11-21.log

Paper version is 1.8.8

[Xefreh]

I tried to set @CommandPresence(DefaultPresenceProvider.class) but I end up having a NPE.
2024-11-21-6.log

[Xefreh]

ok so putting Args as a field doesn't work but using the annotation "Arg" works on the method parameters.

[Xefreh]

any updates ?