Cors Issue In Laravel 9 / Axios

Question

I'm trying to upload a file using Axios but Im getting an error I tried everything, It works fine on Postman ( I can upload ), the problem only in the browser

This is my cors.php file :

    'paths' => ['api/*'],

    'allowed_methods' => ['*'],

    'allowed_origins' => ['*'],

    'allowed_origins_patterns' => [],

    'allowed_headers' => ['*'],

    'exposed_headers' => ['*'],

    'max_age' => 0,

    'supports_credentials' => false,

This is my Axios request:

selectedFile: function(){

            let form = document.getElementById('myform');
            let data = new FormData(form);
            data = data.append('file', document.querySelector(".dropzoneFile").files[0]);
  
           axios.post("http://testing.localhost/api/lab/",
                data,
                    {
                        headers: {
                            "Content-Type": "multipart/form-data",
                            "Authorization": "Bearer 186|k28yQNGcJcjZAi7k2ilYR0MUxh8pljMy56JOH4QS",
                            "Accept": "*/*",
                            "Access-Control-Allow-Origin": "*"
                        }
                    }
                )
                .then(function (response) {
                    //handle success
                    console.log(response);
                })
                .catch(function (response) {
                    //handle error
                    console.log(response);
            });

        }

This is my Route inside Api.php Protected by sanctum:

Route::post('/lab', function (Request $request) {
        dd($request->all());
    });

Result :

Request URL: http://testing.localhost/api/lab/
Request Method: POST
Status Code: 500 
Referrer Policy: strict-origin-when-cross-origin

By the Way All my normal forms works fine but that one because I'm uploading a file And It works fine when I use Postman, the problem only in the browser

Answer 1

Found it by my self : NEVER AND NEVER USE dd(); While you are using API. because of the preflight should not return an HTTP error, and that's what dd() caused