405 – Method not allowed , cant get a solucion

I’m making an webapp. In this webapp im using a webservice that was already made. Before i started to develop this app for the web , i make the exact same in java for android and everything of the post requests worked fine but in this web app it doesen’t. Also in postman works like a charm.
Can someone help me to figure out thats wrong?
Here is my code:

<?php
header("Access-Control-Allow-Origin: *");  
header("Access-Control-Allow-Methods: POST, GET, PUT, DELETE, OPTIONS");
header("Access-Control-Allow-Headers: Content-Type, Authorization");

session_start();


$totalPrice = 0;
$itemTotal = 0;


if (isset($_SESSION['cart']) && !empty($_SESSION['cart'])) {
    
    echo '<ul>';
    foreach ($_SESSION['cart'] as $key => $item) {
        echo '<li>';
        // Output item details
        // For example:
        echo 'Código: ' . $item['codigo'] . ', ';
        echo 'Descrição: ' . $item['descricao'] . ', ';
        echo 'Preço: ' . $item['preco'] . ', ';
        echo 'Quantidade: ' . $item['quantidade'];
        echo '</li>';
    }
    echo '</ul>';
} else {
    echo 'O carrinho está vazio.';
}

echo '<p>Total a pagar: ' . $totalPrice . '€</p>' . '<br>';


if (isset($_POST['fazerEncomenda'])) {
    
    if (!isset($_SESSION['user_id'])) {
        echo 'Utilizador não está logado.';
        exit;
    }

    
    $userId = $_SESSION['user_id'];

    // THE PARAMETERES ARE FIXED FOR NOW 
    $order = array(
        "FiscalYear" => "2024",
        "SectionCode" => "1",
        "DocTypeAbbrev" => "ENCCL",
        "EntityCode" => 1,
        "Date" => "09/02/2024",
        "ExpirationDate" => "08/12/2024",
        "CurrencyCode" => "EUR",
        "Lines" => array(
            array(
                "LineNumber" => 1,
                "ItemCode" => "1",
                "ItemDescription" => "artigo teste",
                "Quantity" => 1,
                "VATTax" => 23,
                "UnitPriceExcludedVAT" => "1",
                "GetReportBytes" => true
            )
        )
    );

  
    $ch = curl_init('http://myip/ERPV22/api/EncomendarUser/GenerateCustomerOrder');
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($order));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Cookie: PHPSESSID=' . session_id() 
    ));

    
    $decodedCookies = urldecode($_SERVER['HTTP_COOKIE']);
    curl_setopt($ch, CURLOPT_COOKIE, $decodedCookies);

    $response = curl_exec($ch);
    echo $response; 
}
?>

<form method="post"> 
    
    <input type="submit" name="fazerEncomenda" value="Fazer Encomenda">
</form>

Thanks for everyone’s help!