DataTable Serverside rendering is not working

Question

I am also trying to implement server-side rendering with help of datatable. However, I don't have a standalone API hence I am using one public API mentioned here: https://api.instantwebtools.net/v1/airlines

This API provides a good amount of data. I have created JSFIDDLE for my reference to replicate the issue. Please refer to the below link to debug JSFIDDLE

Any help will be appreciated. Thanks in advance. HTML Code

<table id="serverside">
<thead>
    <tr>
        <th>Country</th>
        <th>established</th>
        <th>head_quaters</th>
        <th>ID</th>
        <th>Logo</th>
        <th>Name</th>
        <th>slogan</th>
        <th>website</th>            
    </tr>
</thead>
<tbody></tbody>