PHP - Curl en php - Error 500

<?php

    $ch = curl_init();

    $cookie = "cookies.txt";

    $userAgent = 'Mozilla/5.0 (Windows NT 5.1; rv:31.0) Gecko/20100101 Firefox/31.0';

    $url = 'https://zeusr.sii.cl/cgi_AUT2000/CAutInicio.cgi';

    $post_data = array(

        'rutcntr' => '11.111.111-K',

        'password' => 'AAAA',

        'clave'    => 'AAAA',

        'rut'      => '11111111',

        'referencia' => 'http://www.sii.cl',

        'dv'         => 'K'

    );

    curl_setopt($ch, CURLOPT_URL, $url);

    curl_setopt($ch, CURLOPT_POST, TRUE);   //is it optional?

    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);

    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);

    curl_setopt($ch, CURLOPT_USERAGENT,$userAgent);

    curl_setopt($ch, CURLOPT_COOKIE,$cookie);

    curl_setopt($ch, CURLOPT_COOKIEJAR,$cookie);

    curl_setopt($ch, CURLOPT_COOKIEFILE,$cookie);

    curl_setopt($ch, CURLOPT_FOLLOWLOCATION,1);

    curl_setopt($ch, CURLOPT_HEADER,1);

    curl_setopt($ch, CURLOPT_TIMEOUT,-1);

     curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Content-type: text/html; charset=utf-8' ));

    curl_setopt($ch, CURLOPT_REFERER, 'https://zeusr.sii.cl//AUT2000/InicioAutenticacion/IngresoRutClave.html');

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

    curl_setopt($ch, CURLOPT_CAINFO, getcwd() . "/cert/DigiCertHighAssuranceEVRootCA.crt");

    $result  = curl_exec($ch);

    $err     = curl_error($ch);

    curl_close($ch);

    if ($err)

     {

        echo "cURL Error #:" . $err;

     }

    else

     {

        echo "<pre>";

        print_r($result);

        echo "</pre>";

     }

?>

cURL Error #:error setting certificate verify locations:

  CAfile: /home/mauro/Dropbox/Work/Leeway/Academy/Tests/chile/cert/DigiCertHighAssuranceEVRootCA.crt

  CApath: /etc/ssl/certs

$err     = curl_error($ch);

     if ($err)

     {

        echo "cURL Error #:" . $err;

     }

    else

     {

        echo "<pre>";

        print_r($result);

        echo "</pre>";

     }

$post_data = array(

        'rutcntr' => '11.111.111-K',

        'password' => 'AAAA',

        'clave'    => 'AAAA',

        'rut'      => '11111111',

        'referencia' => 'http://www.sii.cl',

        'dv'         => 'K');

$header = array(

    'Content-type: application/x-www-form-urlencoded',

    'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3',

    'Accept-Encoding: gzip, deflate, br', 'Accept-Language: es-419,es;q=0.9,en;q=0.8',

    'Cache-Control: max-age=0',

    'Connection: keep-alive',

    'Content-Length: 114',

    'Cookie: s_cc=true',

    'Host: zeusr.sii.cl',

    'Origin: https://zeusr.sii.cl',

    'Referer: https://zeusr.sii.cl//AUT2000/InicioAutenticacion/IngresoRutClave.html?https://misiir.sii.cl/cgi_misii/siihome.cgi',

    'Upgrade-Insecure-Requests: 1',

    'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36' );

curl_setopt($ch, CURLOPT_HTTPHEADER, $header);