How can I troubleshoot DataTables not displaying data

1. Enable debugging mode by setting `APP_DEBUG=true` in your `.env` file. This will include the queries and inputs used when processing the table in the response, which can help identify any issues[1].

2. Configure error handling by updating the `error` key in `config/datatables.php`. Set it to `'error' => null` to use the actual exception message in the response, `'error' => 'throw'` to throw a `\Yajra\DataTables\Exception`, or `'error' => 'Any custom friendly message'` to use a custom error message[1].

3. Use the DataTables debugger to gather information about the DataTables used on any web-page and submit it to the DataTables debug server. It provides a unique code to identify the submitted table information which you can use in your support request[1].

4. Avoid using `php artisan serve` as there are known bugs when using it where Laravel randomly returns a redirect, 401 Unauthorized, or 404 NotFoundHttpException. It is advised to use Homestead or Valet when working with the package[1].

5. Check if you are using the same HTML id (`#table`) for each table. HTML does not support using the same ID more than once on a page. Use unique IDs for each table[4].

6. Ensure you are returning an empty array if there is no data instead of a 204 No Content response. Change your server-side code to pass an empty array for 204 and 200 on success[4].

7. Add a unique `id` to each table and use the corresponding `DataTable` instance for each table. Calling `ajax.url().load()` with the same table instance may cause issues[4].

By following these steps and checking for common issues like duplicate IDs and incorrect server-side responses, you should be able to resolve most problems with DataTables not displaying data.