here is the error :

then script order

<script src="{{ asset('black') }}/js/jquery-3.5.1.js"></script>
<script src="{{ asset('black') }}/js/datatable.js"></script>
<link rel="stylesheet" href="https://cdn.datatables.net/1.11.3/js/dataTables.bootstrap4.min.js">
<link rel="stylesheet" href="https://cdn.datatables.net/buttons/2.0.1/js/dataTables.buttons.min.js" >
<script src="https://cdnjs.cloudflare.com/ajax/libs/jszip/3.1.3/jszip.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.53/pdfmake.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.53/vfs_fonts.js"> </script>
<script src="https://cdn.datatables.net/buttons/2.0.1/js/buttons.html5.min.js"> </script>
<script src="https://cdn.datatables.net/buttons/2.0.1/js/buttons.print.min.js"> </script>
    

my error keeps getting undefined setting pdfmake. why is that happen?