Error Timeout 504 GET Request JSON cURL PHP with HTTPheader - php

Question

I have a PHP script to request JSON data with cURL, PHP and HTTPheader, before it worked but suddenly it is not working, and I got Gateway Timeout 504.
This PHP script run from Linux VPS Hosting, with specs:
OS Debian 11,
Apache/2.4.54 (Debian)
mod_fcgid/2.3.9
OpenSSL/1.1.1n
PHP Version 7.4.30.
curl 7.74.0
And this is my code:
<?php
$consid = "my_id";
$secretKey = "my_secretkey";
date_default_timezone_set('UTC');
$tStamp = strval(time()-strtotime('1970-01-01 00:00:00'));
$signature = hash_hmac('sha256', $consid."&".$tStamp, $secretKey, true);
$encodedSignature = base64_encode($signature);
$ch = curl_init();
$headers = array(
'X-cons-id: '.$consid.'',
'X-timestamp: '.$tStamp.'',
'X-signature: '.$encodedSignature.'',
'Content-Type: Application/JSON',
'Accept: Application/JSON'
);
curl_setopt($ch, CURLOPT_URL, "https://domain.tld/aplicaresws/rest/bed/ref/kelas");
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_TIMEOUT, 60);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'DEFAULT#SECLEVEL=1');
$content = curl_exec($ch);
$err = curl_error($ch);
$data = json_decode($content,true);
foreach ($data["response"] as $record) {}
$data2 = array( 'data' => $record );
$data3 = json_encode($data2);
$fp = fopen("bedlist.json", "w");
fwrite($fp, $data3);
fclose($fp);
curl_close($ch);
?>
Please help review my script what's wrong with this curl PHP code?