Error

package de.xkev320x.sponge;

import org.slf4j.Logger;
import org.spongepowered.api.Game;
import org.spongepowered.api.entity.player.Player;
import org.spongepowered.api.event.Subscribe;
import org.spongepowered.api.event.state.PreInitializationEvent;
import org.spongepowered.api.event.state.ServerStartedEvent;
import org.spongepowered.api.plugin.Plugin;
import org.spongepowered.api.text.Texts;
import org.spongepowered.api.util.command.CommandException;
import org.spongepowered.api.util.command.CommandResult;
import org.spongepowered.api.util.command.CommandSource;
import org.spongepowered.api.util.command.args.CommandContext;
import org.spongepowered.api.util.command.source.CommandBlockSource;
import org.spongepowered.api.util.command.source.ConsoleSource;
import org.spongepowered.api.util.command.spec.CommandExecutor;
import org.spongepowered.api.util.command.spec.CommandSpec;

import com.google.inject.Inject;

@Plugin(id="test", name = "Sponge-Test", version = "0.1")
public class Main {

    @Inject
    private Logger logger;
    @Inject
    private Game game;

    CommandSpec sp = CommandSpec.builder()
            .setDescription(Texts.of("Meine Beschreibung"))
            .setPermission("my.perm")
            .setExecutor(new CommandExecutor() {
                @Override
                public CommandResult execute(CommandSource cs, CommandContext cc) throws CommandException {
                    if(cs instanceof Player) {
                        cs.sendMessage(Texts.of("Hallo" + cs.getName()));

                    }
                    else if(cs instanceof ConsoleSource) {
                        cs.sendMessage(Texts.of("Na du Konsole"));
                    }
                    else if(cs instanceof CommandBlockSource) {
                        cs.sendMessage(Texts.of("Na du CommandBlock! :D"));
                    }
                    return CommandResult.success();
                }
            })
            .build();


    @Subscribe
    public void onPre(PreInitializationEvent e) {
        game.getCommandDispatcher().register(this, sp, "hallo", "hi");
    }


    @Subscribe
    public void onStart(ServerStartedEvent e) {
        logger.info("Hallo leuts!"); //besser als sysout..
    }
}