Problema com POST PHP+JAVASCRIPT

$.ajax({
type: "POST",
url: "/contato",
data: {
"name": $("#footer-form #name2").val(),
"email": $("#footer-form #email2").val(),
"fone": $("#footer-form #fone2").val(),
"subject": $("#footer-form #subject2").val(),
"message": $("#footer-form #message2").val()
},
dataType: "json",

 success: function (data) {
 if (data.sent == "yes") {
 $("#MessageSent2").removeClass("hidden");
 $("#MessageNotSent2").addClass("hidden");
 $(".submit-button").removeClass("btn-default").addClass("btn-success").prop('value', 'Mensagem enviada');
 $("#footer-form .form-control").each(function() {
 $(this).prop('value', '').parent().removeClass("has-success").removeClass("has-error");
 });
 } else {
 $("#MessageNotSent2").removeClass("hidden");
 $("#MessageSent2").addClass("hidden");
 }
 }
 })

$router = new \Bramus\Router\Router();

// Check JWT on /secured routes. This can be any route you like

$router->before('GET', '/secured/.*', function () {

 // This method will exist if you're using apache
 // If you're not, please go to the extras for a defintion of it.
 $requestHeaders = apache_request_headers();
 $authorizationHeader = $requestHeaders['Authorization'];

 if ($authorizationHeader == null) {
 header('HTTP/1.0 401 Unauthorized');
 echo "No authorization header sent";
 exit();
 }
});

// Controllers API

$router->get('/ping', function () {
 $dado = array(
 "status" => 'ok',
 "message" => 'Everybody can do this...'
 );
 echo json_encode($dado);
});

$router->get('/secured/ping', function () {
 echo "All good. You only get this message if you're authenticated";
});

// Run the Router
$router->run();

// Activate CORS
function sendCorsHeaders()
{

 header("Access-Control-Allow-Origin: *");
 header("Access-Control-Allow-Headers: Authorization");
 header("Access-Control-Allow-Methods: GET,HEAD,PUT,PATCH,POST,DELETE");
}

$router->options('/.*', function () {
 sendCorsHeaders();
});
sendCorsHeaders();

>
erros:no-referrer-when-downgrade-origin-when-cross-origin

Provisional headers are show

eu ja tive esse problema anteriormente e usei essa classe + esses header para resolver em um site de um cliente problema que nesse site que estou trabalhando não está resolvendo.