怎么查找 Retrofit 请求失败的原因呢

请求失败，又不知道什么原因，该怎么解决

private void getData() { String baseUrl1 = "http://demo.wp-api.org/"; Retrofit retrofit1 = new Retrofit.Builder() .baseUrl(baseUrl1) .addConverterFactory(GsonConverterFactory.create()) .build(); ArticleaaApi articleaaApi=retrofit1.create(ArticleaaApi.class); Call<ArticleBean> articleBeanCall = articleaaApi.getArticle(); articleBeanCall.enqueue(new Callback<ArticleBean>() { @Override public void onResponse(Call<ArticleBean> call, Response<ArticleBean> response) { System.out.println("S"); } @Override public void onFailure(Call<ArticleBean> call, Throwable t) { System.out.println("F"); } }); } 

API ：

public interface ArticleaaApi { @GET("wp-json/wp/v2/posts") Call<ArticleBean> getArticle(); }