HI Alvaro,
Thank you for your purchase.

Can you please tell me which version of our plugin do you use.

Best regards.

Hi Alvaro,

There is a new 2.2 version of our plugin.

Please take a look at our documentation where you can see how you can successfully update the plugin.

You can follow this guide :

1.) Download zip from this link

2.) Use FTP to open /yourwordpressfolder/wp-content/plugins

3.) Delete existing wpdatatables folder.

4.) Upload previously downloaded wpdatatables folder through FTP to plugins folder (unzip it)

5.)  Go to WP-admin panel, open Plugins section.

6.) Deactivate wpDataTables, and then activate it again.

That error that you receive is when you have some character or probably space in the column name.

Let me know if you still have the same issue after update.

Best regards.