error: cannot find symbol .addInterceptor(OkHttp3Helper.getPinningInterceptor())

Hi there, as the title suggests, it's complaining about not being able to find symbol OkHttp3Helper and I'm not sure what to do!

package af.myapp;
import android.os.Bundle;
import com.facebook.react.ReactActivity;
import com.zoontek.rnbootsplash.RNBootSplash;
import com.datatheorem.android.trustkit.TrustKit;
import com.datatheorem.android.trustkit.reporting.BackgroundReporter;

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;

import okhttp3.OkHttpClient;

// omitted code

@Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Using the default path - res/xml/network_security_config.xml
    TrustKit.initializeWithNetworkSecurityConfiguration(this);

    URL url = new URL("https://172.30.200.168");
    String serverHostname = url.getHost();

    // HttpsUrlConnection
    HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
    connection.setSSLSocketFactory(TrustKit.getInstance().getSSLSocketFactory(serverHostname));
    
    // OkHttp 3.0.x, 3.1.x and 3.2.x
    OkHttpClient client =
      new OkHttpClient.Builder()
          .sslSocketFactory(OkHttp3Helper.getSSLSocketFactory())
          .addInterceptor(OkHttp3Helper.getPinningInterceptor())
          .followRedirects(false)
          .followSslRedirects(false);

    RNBootSplash.init(R.drawable.bootsplash, MainActivity.this); // <- display the generated bootsplash.xml drawable over our MainActivity
  }

Start at the MainActivity onCreate code shown in the report and inspect the TrustKit and OkHttp integration APIs used there. Verify which dependency version provides OkHttp3Helper and whether the interceptor reference matches the current API; done means the Android project compiles with the SSL-pinning setup.