php - Laravel Storage download returns blank page/wrong Header

one text

I try to download an xlsx-File with Laravel Storage:

    $header = [
        'Content-Type: application/vnd.ms-excel'
    ];
    //dd(Storage::exists('invoices.xlsx')); // true
    return Storage::download('invoices.xlsx', 'invoices.xlsx', $header);

It returns a blank page (local & live System) with the following Header:

host: 127.0.0.1:8000
date: Wed, 15 Nov 2022 18:31:14 GMT; Wed, 15 Nov 2022 18:31:14 GMT
connection: close
x-powered-by: PHP/8.0.14
cache-control: no-cache, private
content-type: text/html; charset=UTF-8

Any suggestions?