Paypal Payment Failed - Vendor account does not have a confirmed email

Question

I am trying to integrate PayPal into my Android app using Java. The integration is complete, but I am encountering the following error when attempting to process a payment:

PayPal Payment Failed - Vendor account does not have a confirmed email

Additionally, when I checked the PayPal API response, I saw the following error details:

    {
        "name": "PAYEE_ACCOUNT_INVALID",
        "message": "Payee account is invalid."
    }

Steps I Took: Sandbox Testing:

• Used a sandbox client ID and tried making a payment using the test Visa card 4242 4242 4242 4242.
• Received the same error.

Live Testing:

• Used the live client ID and attempted payment using my HDFC card. Encountered the same issue.
• Logged into my PayPal account, but I couldn't figure out what might be causing the issue.

My Code: Here is my code:

    package com.example.paypalproject;
    
    import android.content.ActivityNotFoundException;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Bundle;
    import android.util.Log;
    import android.widget.Button;
    import android.widget.TextView;
    import android.widget.Toast;
    import java.util.UUID;
    import java.math.BigDecimal;
    
    import androidx.activity.result.ActivityResultLauncher;
    import androidx.activity.result.contract.ActivityResultContracts;
    import androidx.appcompat.app.AppCompatActivity;
    
    import com.paypal.android.sdk.payments.PayPalConfiguration;
    import com.paypal.android.sdk.payments.PayPalPayment;
    import com.paypal.android.sdk.payments.PayPalService;
    import com.paypal.android.sdk.payments.PaymentActivity;
    import com.paypal.android.sdk.payments.PaymentConfirmation;
    
    public class MainActivity extends AppCompatActivity {
    
        private static final String PAYPAL_CLIENT_ID = ""; // sandbox client id i have used here
    
        private static final int PAYPAL_REQUEST_CODE = 123;
    
        private String transactionReferenceId;
        private TextView paymentStatus;
        private ActivityResultLauncher<Intent> paymentResultLauncher;
    
        private PayPalConfiguration payPalConfig;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            paymentStatus = findViewById(R.id.payment_status);
            Button paypalpayButton = findViewById(R.id.paypalpay_button);
    
            // Initialize PayPal configuration
            payPalConfig = new PayPalConfiguration()
                    .environment(PayPalConfiguration.ENVIRONMENT_SANDBOX) // Use sandbox for testing
                    .clientId(PAYPAL_CLIENT_ID);
    
    
            // Start PayPal service
            Intent intent = new Intent(this, PayPalService.class);
            intent.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, payPalConfig);
            startService(intent);
    
            // Generate unique transaction reference ID
            transactionReferenceId = "T" + UUID.randomUUID().toString().substring(0, 8);
            Log.d("UPI Payment", "transactionReferenceId: " + transactionReferenceId);
    
            // Set onClickListener for the PayPal pay button
            paypalpayButton.setOnClickListener(v -> initiatePayPalPayment());
        }
    
        private void initiatePayPalPayment() {
            // Create a PayPal payment object
    
            double inrAmount = 1; // Amount in INR
            double conversionRate = 86.39;
            double usdAmount = inrAmount / conversionRate;
    
            PayPalPayment payment = new PayPalPayment(new BigDecimal(usdAmount), "USD", "Live Payment", PayPalPayment.PAYMENT_INTENT_SALE);
    
            // Create an intent for PayPal payment
            Intent intent = new Intent(this, PaymentActivity.class);
            intent.putExtra(PayPalService.EXTRA_PAYPAL_CONFIGURATION, payPalConfig);
            intent.putExtra(PaymentActivity.EXTRA_PAYMENT, payment);
    
            // Launch PayPal payment activity
            startActivityForResult(intent, PAYPAL_REQUEST_CODE);
        }
    
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
    
            if (requestCode == PAYPAL_REQUEST_CODE) {
                if (resultCode == RESULT_OK && data != null) {
                    PaymentConfirmation confirmation = data.getParcelableExtra(PaymentActivity.EXTRA_RESULT_CONFIRMATION);
                    if (confirmation != null) {
                        try {
                            // Log and handle the payment confirmation
                            String paymentDetails = confirmation.toJSONObject().toString(4);
                            Log.d("PayPalPayPalPayPal", "Payment Confirmation: " + paymentDetails);
                            paymentStatus.setText("Payment successful!");
                            Toast.makeText(this, "Payment successful!", Toast.LENGTH_SHORT).show();
                        } catch (Exception e) {
                            Log.e("PayPalPayPalPayPal", "Error: " + e.getMessage());
                        }
                    }
                } else if (resultCode == RESULT_CANCELED) {
                    paymentStatus.setText("Payment canceled.");
                    Toast.makeText(this, "Payment canceled.", Toast.LENGTH_SHORT).show();
                } else if (resultCode == PaymentActivity.RESULT_EXTRAS_INVALID) {
                    paymentStatus.setText("Invalid Payment.");
    
                    Toast.makeText(this, "Invalid Payment.", Toast.LENGTH_SHORT).show();
                }
            }
        }
    
    
        @Override
        protected void onDestroy() {
            stopService(new Intent(this, PayPalService.class));
            super.onDestroy();
        }
    }

Questions:

• How can I fix the "Vendor account does not have a confirmed email" error?
• Is there any additional setup required in PayPal to validate my vendor account for sandbox or live environments?
• Could this issue be related to the client ID or PayPal account type? Any guidance or suggestions would be greatly appreciated.

Screenshot is shown below: