pdfmake error

by fuggfuggfugg

HTML

<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/application-a87edf1d7c8cbbfb1894c45b9c3aec2f41ace01e7f0962b0e58196ad8d06c32a.js"></script>
<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/jquery.datatables-9ce9a4abc13df5310504c67b1412a1f367fead279c2e893cdf846dade425891a.js"></script>
<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/datatable_ext/pdfmake.min-28c67b3942f0bb63178ccfa1df0c7497a33f09048e884a539c7c4e953b1317af.js"></script>
<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/datatable_ext/vfs_fonts-d49df7b9edd3f5d98f408c97f3656f8054644ff0366e5b86d65863fce0bd06f4.js"></script>
<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/datatable_ext/buttons.datatables.min-6400bdfa99d63bfc250fb3b69d509dd667b33bb2006b95f60611bd246566c42a.js"></script>
<script src="https://d3czu6zp3f06wr.cloudfront.net/assets/jquery.beautytable-9a303828199857365ba8ce5bc8b1f582fd71239c66e2b97b56f3737a39efe06f.js"></script>


<table id="example" class="display" style="width:100%">
        <thead>
            <tr>
                <th>Name</th>
                <th>Position</th>
                <th>Office</th>
                <th>Age</th>
                <th>Start date</th>
                <th>Salary</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>Tiger Nixon</td>
                <td>System Architect</td>
                <td>Edinburgh</td>
                <td>61</td>
                <td>2011-04-25</td>
                <td>$320,800</td>
            </tr>
            <tr>
                <td>Garrett Winters</td>
                <td>Accountant</td>
                <td>Tokyo</td>
                <td>63</td>
                <td>2011-07-25</td>
                <td>$170,750</td>
            </tr>
            <tr>
                <td>Ashton Cox</td>
                <td>Junior Technical Author</td>
                <td>San Francisco</td>
                <td>66</td>
                <td>2009-01-12</td>
           ...

JavaScript

$(document).ready(function() {
    $('#example').DataTable( {
        dom: 'Bfrtip',
        buttons: [
            'copyHtml5',
            'excelHtml5',
            'csvHtml5',
            'pdfHtml5'
        ]
    } );
} );