Error Show "Error in response!" Help any one please

API
1

package com.kp.myapplication;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import com.google.gson.JsonObject;

import okhttp3.OkHttpClient;
import retrofit2.Call;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.http.Body;
import retrofit2.http.Headers;
import retrofit2.http.POST;

public class MainActivity extends AppCompatActivity {

private EditText answerEditText;
private Button submitAnswerButton;
private TextView feedbackTextView;
private TextView questionTextView;

// OpenAI API Key (replace with your key)
private static final String OPENAI_API_KEY = "YOUR_OPENAI_API_KEY";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Initialize UI elements
    answerEditText = findViewById(R.id.answerEditText);
    submitAnswerButton = findViewById(R.id.submitAnswerButton);
    feedbackTextView = findViewById(R.id.feedbackTextView);
    questionTextView = findViewById(R.id.questionTextView);

    // Set sample question
    questionTextView.setText("What is your understanding of Object-Oriented Programming?");

    submitAnswerButton.setOnClickListener(v -> {
        String answer = answerEditText.getText().toString();
        if (!answer.isEmpty()) {
            analyzeAnswer(answer);  // Send answer to GPT model
        }
    });
}

private void analyzeAnswer(String answer) {
    // Setup Retrofit
    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("https://api.openai.com/v1/chat/completions/")
            .addConverterFactory(GsonConverterFactory.create())
            .client(new OkHttpClient.Builder().build())
            .build();

    // Create API Service
    OpenAIApi openAIApi = retrofit.create(OpenAIApi.class);

    // Prepare request body
    JsonObject jsonBody = new JsonObject();
    jsonBody.addProperty("model", "gpt-3.5-turbo-16k");
    jsonBody.addProperty("prompt", "Analyze the following answer: " + answer);
    jsonBody.addProperty("max_tokens", 100);

    // Make API call
    Call<JsonObject> call = openAIApi.analyzeAnswer("Bearer " + OPENAI_API_KEY, jsonBody);
    call.enqueue(new retrofit2.Callback<JsonObject>() {
        @Override
        public void onResponse(Call<JsonObject> call, retrofit2.Response<JsonObject> response) {
            if (response.isSuccessful() && response.body() != null) {
                String feedback = response.body().get("choices").getAsJsonArray()
                        .get(0).getAsJsonObject().get("text").getAsString();
                runOnUiThread(() -> feedbackTextView.setText(feedback));
            } else {
                runOnUiThread(() -> feedbackTextView.setText("Error in response!"));
            }
        }

        @Override
        public void onFailure(Call<JsonObject> call, Throwable t) {
            runOnUiThread(() -> feedbackTextView.setText("Failed to analyze answer!"));
        }
    });
}

// Retrofit API interface
interface OpenAIApi {
    @Headers({
            "Content-Type: application/json"
    })
    @POST("v1/completions")
    Call<JsonObject> analyzeAnswer(@retrofit2.http.Header("Authorization") String authHeader,
                                   @Body JsonObject body);

}

}