TLDR: My php file executes a curl request fine when you go to the URL or CLI, if I call this php file from the site URL using ajax or fetch, I get no response and no error codes. Just blank respone.

EDIT**
I found the server logs for my AWS script. It is receiving the POST request. [07/Sep/2024 15:44:00] "POST /update_synopsis HTTP/1.1" 200 -

I have a API hosted on AWS that I send JSON to. This was working fine 6hrs ago. I made no changes to the code, and now the cURL I send data to the API with is broken. I have a .html page that calls a php file on button press.

$.post('./send.php', toForward, function(response) {
            console.log(response);
            console.log("submit")
        }, 'json');
//OR
$.ajax({
            url: 'omittingTheURL.com/send.php',
            type: "POST",
            dataType: "json",
            success: function(data) {
                console.log(data + "test"); // Alert the results
            }
        });

I have dumbed down the code into a debug state and eliminated the reading of the sent JSON (toForward). Here is the php file. I have tried a few things with headers just in case its a CORS issue, but I get no CORS errors. I know jQuery is a google thing, so not sure if its sending through googles URL?

if (isset($_SERVER['HTTP_ORIGIN'])) {
    // should do a check here to match $_SERVER['HTTP_ORIGIN'] to a
    // whitelist of safe domains
    header("Access-Control-Allow-Origin: {$_SERVER['HTTP_ORIGIN']}");
    header('Access-Control-Allow-Credentials: true');
    header('Access-Control-Max-Age: 86400');    // cache for 1 day
}
// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {

    if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
        header("Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS");         

    if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
        header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");

}
$json = json_encode(array('appliancePrompt'=> 'This is a test. Say potato.'));
$url = 'https://flask-service.6pkt8q75gkone.us-east-2.cs.amazonlightsail.com/update_synopsis'; //Mechanic AI API
$data = json_decode($json, true);
// Convert data to JSON format
$jsonData = json_encode($data);
echo $json;

// cURL setup
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($jsonData)
));

// Execute the request
$response = curl_exec($ch);
curl_close($ch);
echo $response;

Whenever I run the code with the cURL function, it doesnt output anything. No error logs at all. No echos from the lines above the cURL either. I dont even get my echo $json output for some reason when I run the cURL. If I comment out the curl execute then I get my echo returns and everything looks proper. The JSON is formatted fine for my receiving end. I cant stress how much that this was working hours ago and I made 0 changes to it. I also dont understand why it works using the phps browser slug but NOT a fetch/ajax/jquery request.