Fatal Error curl_init() Function

When trying to post an article. I’m getting a few errors after posting. The plugin isn’t working currently either, but here’s the main error:

Fatal error: Uncaught Error: Call to undefined function curl_init() in /home/rhhpxlmy/public_html/wp-content/plugins/twitter-auto-publish/api/twitteroauth.php on line 759

Here’s the full code on line 759:

// configure curl
    $c = curl_init();
    switch ($this->request_settings['method']) {
      case 'GET':
        if (isset($this->request_settings['querystring']))
          $this->request_settings['url'] = $this->request_settings['url'] . '?' . $this->request_settings['querystring'];
        break;
      case 'POST':
        curl_setopt($c, CURLOPT_POST, true);
        if (isset($this->request_settings['postfields']))
          $postfields = $this->request_settings['postfields'];
        else
          $postfields = array();

        curl_setopt($c, CURLOPT_POSTFIELDS, $postfields);
        break;
      default:
        if (isset($this->request_settings['postfields']))
          curl_setopt($c, CURLOPT_CUSTOMREQUEST, $this->request_settings['postfields']);
    }

Please let me know your thoughts or if you’ve seen this error before and thanks!