Hi dicksonchan,
Thank you for your purchase.

Please provide me a temporary WP-admin login for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. You can write credentials here just check Private Reply so nobody can see them except us.

Also point me on table id where you have this issue so I can take a look.

Best regards.

Hi dicksonchan,

Can you please check now and tell me do you have any issues.

Best regards.

Hi dicksonchan,

You are welcome.
There was a small issues with the some versions of PHP that throws that notice and the error. 

I patched the code on your site and this change will be included in our next update.

This is what I changed in case you want to apply somewhere else:

1.

In file  wp-content/plugins/wpdatatables/source/class.wpdatatable.php  around line 1681 find this line of code

 $colObjs = $this->prepareColumns($wdtParameters, $colObjs);

and change it to look like this

$colObjs = $this->prepareColumns($wdtParameters);

2.

In file wp-content/plugins/wpdatatables/source/class.wdtconfigcontroller.php

around line 568 find this line of code

$table_config-> $mysql_table_name;

and change it to look like this

$mysql_table_name = $table_config->mysql_table_name;

Best regards.