When i submit FormData using Json/Ajax it is not going through [closed]

Im trying to add profile photo to my users but when im trying to click submit button it is not going through.

Here is my Json

function getUserFormData(form) {
    return  {
        action: "addUser",
        user: {
            user_id: User : null,
            email: form['email'].value,
            username: form['username'].value,
            password: Util.hash(form['password'].value),
            password_confirmation: Util.hash(form['password_confirmation'].value),
            profile_image: form['profile_image'].value
        }
    };
}

AS.Http.submituser = function (form, data, success, error, complete) {
    AS.Util.removeErrorMessages();

    var $submitBtn = $(form).find("button[type=submit]");
    var $fileupload = $(data).prop('profile_image');
    var formData = new FormData();
    formData.append('file', $fileupload);

    if ($submitBtn) {
        AS.Util.loadingButton($submitBtn, $submitBtn.data('loading-text') || $_lang.working);
    }

    $.ajax({
        url: "/Ajax.php",
        cache: false,
        contentType: false,
        processData: false,
        type: "POST",
        dataType: "json",
        data: data,
        success: function (response) {
            form.reset();

            if (typeof success === "function") {
                success(response);
            }
        },
        error: error || function (errorResponse) {
            AS.Util.showFormErrors(form, errorResponse);
        },
        complete: complete || function () {
            if ($submitBtn) {
                AS.Util.removeLoadingButton($submitBtn);
            }
        }
    });
};

Here is the Back End

    public function add(array $data)
    {
        if ($errors = $this->registrator->validateUser($data, false)) {
            ASResponse::validationError($errors);
        }
        // Handle secure profile image upload
        $files = $data['profile_image'];
        $targetDirectory = "../assets/img/usersprofile/";
        $imageFileType = strtolower(pathinfo($files["profile_image"]["name"], PATHINFO_EXTENSION));

        // Generate a unique image filename: complete_name_uniqueID.extension
        $username = $data['username'];
        $safeName = preg_replace('/[^A-Za-z0-9]/', '_', $username); // Remove special chars
        $uniqueID = uniqid();
        $imageName = "{$safeName}_{$uniqueID}.{$imageFileType}";
        $targetFile = $targetDirectory . $imageName;

        // Validate image file
        $validMimeTypes = ['image/jpeg', 'image/png', 'image/gif'];
        $check = getimagesize($files["profile_image"]["tmp_name"]);
        if ($check === false || !in_array($check['mime'], $validMimeTypes)) {
            throw new Exception("Invalid image file format.");
        }

        // Check file size (max 2MB)
        if ($files["profile_image"]["size"] > 2000000) {
            throw new Exception("File size exceeds the 2MB limit.");
        }

        // Restrict executable file uploads
        if (preg_match('/.(php|html|htm|js|exe|sh)$/i', $files["profile_image"]["name"])) {
            throw new Exception("Invalid file type.");
        }

        // Ensure upload directory is safe
        if (!is_dir($targetDirectory) && !mkdir($targetDirectory, 0755, true)) {
            throw new Exception("Failed to create upload directory.");
        }

        // Move uploaded file
        if (!move_uploaded_file($files["profile_image"]["tmp_name"], $targetFile)) {
            throw new Exception("Error uploading the image.");
        }

        $this->db->insert('users', [
            'email' => $data['email'],
            'username' => $data['username'],
            'password' => $this->hashPassword($data['password']),
            'profile_image' => $imageName
        ]);



        Response::success(["message" => trans("user_added_successfully")]);
    }

I tried to append file but unfortunately still nothing happen. i cant see what is error because it is not showing.

Permission of folder it read/writable.

I dont know if the code is right, could you please help me!