vertx-dropwizard-metrics issue

MainVerticle.kt

package com.example.starter;

import io.vertx.core.AbstractVerticle;
import io.vertx.core.Promise;
import io.vertx.core.Vertx;
import io.vertx.core.VertxOptions;
import io.vertx.core.http.HttpServer;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.ext.dropwizard.DropwizardMetricsOptions;
import io.vertx.ext.web.Router;

public class MainVerticle extends AbstractVerticle {
  @Override
  public void start(Promise<Void> startPromise) {
    HttpServer server = vertx.createHttpServer();

    Router router = Router.router(vertx);
    router.route().handler(ctx -> {
      HttpServerResponse response = ctx.response();
      response.putHeader("content-type", "text/plain");
      response.end("Hello World from Vert.x-Web!\n");
    });

    server.requestHandler(router).listen(8080, http -> {
      if (http.succeeded()) {
        System.out.println("Server started");
        startPromise.complete();
      } else {
        startPromise.fail(http.cause());
      }
    });

  }

  public static void main(String[] args) {
    var vertx = Vertx.vertx(new VertxOptions().setMetricsOptions(
      new DropwizardMetricsOptions().setJmxEnabled(true)
    ));
    vertx.deployVerticle(new MainVerticle());
  }
}