Hi brad,

Sorry for the inconvenience,

There was an issue on version 4.0, and yesterday we release patch version 4.0.1 that solve that issue. We are not sure how you revert wpdatatables version, but from the error that you got, we assume that you revert to the Lite version of the plugin. My suggestion is to download the latest version from our store, https://store.tms-plugins.com/login. 

My suggestion is to update the plugin manually by following these steps:

1.) Download zip from our store or from the email you received when you purchased the plugin

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

3.) Delete existing wpdatatables folder.

4.) Upload the previously downloaded wpdatatables folder through FTP into "plugins" folder (unzip it)

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

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

7.) Clear server and browser cache

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If you are on hosting where you are not allowed to access your FTP, then follow these instructions:

Please note that, before deleting the plugin from the Plugins page, it is recommended to enable the option "Prevent deleting tables in database" in main settings of the plugin if you want to keep your tables after deletion from the Plugins page. If you uncheck this option, all your tables will be deleted and you will need to create them again.

1.) Download zip from our store or from the email you received when you purchased the plugin

2.) Delete wpDataTables plugin from WordPress' Plugins page

3) Click on Add new in top left of your Plugins page

4) Click on Upload plugin in top left of your Plugins page

5.) Choose the previously downloaded wpdatatables.zip file

6.) When uploading is done, please Activate wpDataTables plugin

7.) Clear server and browser cache.

Please note that our plugin is around 16 MB in size, so if you're are not able to upload it through WordPress plugins page, you will need to increase the following:

upload_max_file size, 

post_max_size,

max_execution_time

You should be able to find these values in your php.ini file or on your hosting panel. If you can't find it yourself, please ask your hosting provider to provide it.

Best regards.