Question about Retrofit: why does it say in the logs that Expected BEGIN_OBJECT but was BEGIN_ARRAY, although there is an object in the arguments?

Question

Java

I have a site from which I parse data using retrofit. Here it is https://api.xn--41a.ws/api.php?method=search&q=%D0... Using www.jsonschema2pojo.org I got a class that matches the data structure of one song. When I put it in arguments, it says Expected BEGIN_OBJECT but was BEGIN_ARRAY.
Code:

MainActivity.java:

public class MainActivity extends AppCompatActivity {
    EditText input;
    Link link;
    String url = "https://api.xn--41a.ws/";
    Retrofit retrofit;
    TextView txt;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txt = findViewById(R.id.text);
        retrofit = new Retrofit.Builder().baseUrl(url).addConverterFactory(GsonConverterFactory.create()).build();
        link = retrofit.create(Link.class);

                link.getSongs("Sting").enqueue(new Callback<GetSong>() {
                    @Override
                    public void onResponse(Call<GetSong> call, Response<GetSong> response) {
                        txt.setText("good");

                    }

                    @Override
                    public void onFailure(Call<GetSong> call, Throwable t) {
                        txt.setText("Fail");
                        t.printStackTrace();
                    }
                });

    }
}

GetSong.java:

public class GetSong {

    @SerializedName("audio_id")
    @Expose
    private String audioId;
    @SerializedName("artist")
    @Expose
    private String artist;
    @SerializedName("title")
    @Expose
    private String title;
    @SerializedName("mp3")
    @Expose
    private String mp3;
    @SerializedName("duration")
    @Expose
    private Integer duration;
    @SerializedName("img")
    @Expose
    private String img;
    @SerializedName("hash")
    @Expose
    private String hash;

    public String getAudioId() {
        return audioId;
    }

    public void setAudioId(String audioId) {
        this.audioId = audioId;
    }

    public String getArtist() {
        return artist;
    }

    public void setArtist(String artist) {
        this.artist = artist;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getMp3() {
        return mp3;
    }

    public void setMp3(String mp3) {
        this.mp3 = mp3;
    }

    public Integer getDuration() {
        return duration;
    }

    public void setDuration(Integer duration) {
        this.duration = duration;
    }

    public String getImg() {
        return img;
    }

    public void setImg(String img) {
        this.img = img;
    }

    public String getHash() {
        return hash;
    }

    public void setHash(String hash) {
        this.hash = hash;
    }

}

Link.java:

public interface Link {
    @GET("api.php?method=search&key=5d2ef46e867e57510c93238c8bd5708a&v=3")
    Call<GetSong> getSongs(@Query("q") String text);
}

Logs:

W/System.err: com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $
W/System.err:     at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:226)
        at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:37)
W/System.err:     at retrofit2.converter.gson.GsonResponseBodyConverter.convert(GsonResponseBodyConverter.java:25)
        at retrofit2.ServiceMethod.toResponse(ServiceMethod.java:150)
        at retrofit2.OkHttpCall.parseResponse(OkHttpCall.java:224)
        at retrofit2.OkHttpCall$1.onResponse(OkHttpCall.java:112)
        at okhttp3.RealCall$AsyncCall.execute(RealCall.java:133)
        at okhttp3.internal.NamedRunnable.run(NamedRunnable.java:32)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
        at java.lang.Thread.run(Thread.java:761)
    Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2 path $
        at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:386)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:215)
    	... 10 more