[SOLVED] POST Requests are failing

    // Prepare and send the WhatsApp message
    $headers = [
        "Content-Type" => "application/json",
        "Accept" => "application/json",
    ];

    $data = [
        "from" => $_ENV["VONAGE_WHATSAPP_NUMBER"],
        "to" => $body["from"],
        "message_type" => "text",
        "text" => 'Hi there! You sent me: ' . $body["text"],
        "channel" => "whatsapp",
    ];

$client = new Client();
    $url = "https://messages-sandbox.nexmo.com/v1/messages";

    try {
        $response = $client->post($url, [
            "headers" => $headers,
            "json" => $data,
            "auth" => [
                $_ENV["VONAGE_API_KEY"],
                $_ENV["VONAGE_API_SECRET"]
            ],
        ]);

        if ($response->getStatusCode() === 200) {
            $result = json_decode($response->getBody(), true);
            return $context->res->json(["ok" => true]);
        } else {
            return $context->error("Error " . $response->getBody());
        }
    } catch (Exception $e) {
        return $context->res->json(["ok" => false], 500);
    }
};
?>

return $context->error("Error " . $response->getBody());

<?php

require(__DIR__ . '/../vendor/autoload.php');
require(__DIR__ . '/utils.php');

use \Firebase\JWT\JWT;
use GuzzleHttp\Client;

return function ($context) {

    throw_if_missing($_ENV, [
      'VONAGE_API_KEY',
      'VONAGE_API_SECRET',
      'VONAGE_API_SIGNATURE_SECRET',
      'VONAGE_WHATSAPP_NUMBER',
  ]);

    if ($context->req->method === 'GET') {
        return $context->res->send(get_static_file('index.html'), 200, [
            'Content-Type' => 'text/html; charset=utf-8',
        ]);
    }

    $body = $context->req->body;
    $headers = $context->req->headers;
    $token = (isset($headers["Authorization"])) ? explode(" ", $headers["Authorization"])[1] : "";


    try {
      $decoded = JWT::decode($token, $_ENV['VONAGE_API_SIGNATURE_SECRET'], ['HS256']);
      $context->log($decoded);
    } catch (Exception $e) {
      $context->error("JWT decoding error: " . $e->getMessage());
    }

    if (hash('sha256', $context->req->bodyRaw) !== $decoded['payload_hash']) {
      return $context->res->json([
        'ok' => false,
        'error' => 'Payload hash mismatch'
      ]);
    }

    try {
      throwIfMissing($context->req->body, ['from', 'text']);
    } catch ( Exception $e) {
      return $context->res->json([ "ok"=> false, "error"=> $e->getMessage()], 400);
    }

    $vonageApiKey = $_ENV['VONAGE_API_KEY'];
    $vonageAccountSecret = $_ENV['VONAGE_API_SECRET'];

    $basicAuthToken = base64_encode("$:$vonageAccountSecret");
    $headers = [
      'Content-Type:application/json',
      'Accept:application/json'
    ];

    $data = [
      'from' => $_ENV['VONAGE_WHATSAPP_NUMBER'],
      'to' => $context->req->body['from'],
      'message-type' => 'text',
      'text' => 'Hi there! You sent me: ' . $context->req->body['text'],
      'channel' => 'whatsapp'
    ];
    $client = new Client();
    $url = "https://messages-sandbox.nexmo.com/v1/messages";

    try {
        $response = $client->post($url, [
            "headers" => $headers,
            "json" => $data,
            "auth" => [
                $_ENV["VONAGE_API_KEY"],
                $_ENV["VONAGE_API_SECRET"]
            ],
        ]);

        if ($response->getStatusCode() === 200) {
            $result = json_decode($response->getBody(), true);
            return $context->res->json(["ok" => true]);
        } else {
            return $context->error("Error " . $response->getBody());
        }
    } catch (Exception $e) {
        return $context->res->json(["ok" => false], 500);
    }
}

Operation timed out after 30001 milliseconds with 0 bytes received with status code 0\nError Code: 0