[Resolved] Webhook sub accepted but not receiving events

API
11 
<?php

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers:*");
ini_set("allow_url_fopen", true);

if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    
    $printString = "";
    
    foreach ($_GET as $key => $value) {
        
        $printString = $printString  . "Key: " . $key . " Val: " . $value . "\n";
    }
    
    file_put_contents("getRequest.txt", $printString);
    
    if (isset($_GET['hub_challenge'])) {
        $challenge = $_GET['hub_challenge'];
        echo $challenge;
    }
}
    
}


if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $payload = "POST received\n";
    //$payload = file_get_contents('php://input');
    file_put_contents("payload.txt", $payload);
}

?>

There’s not much going on in the handler right now. I’m just writing to a file to see if a request is coming through.