Hello Francesco

Please tell me which version of the plugin do you have installed?

I recall an issue like this, but it was related to when WordPress 5 was initially released. It should've been resolved since then.

If you're not on v2.8.3, please update the plugin, and if you're still seeing this, 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. 

Also, please tell me how to recreate the issue when I log in.

You can write credentials here just check Private Reply so nobody can see them except us.

Saw that, Francesco

Some hooks are being used which are disabling Gutenberg editor.

One of our developers is working on the issue, and I'll get back to you as soon as possible.

Thank you for your patience.

Hi again Francesco.

Like mentioned before - some hooksa re being used for disabling Gutenberg.

You need to change that in file wp-content/plugins/wpdatatables/source/GutenbergBlock.php

On line 24, you'll find this:

add_action('init', function () use ($class) {

You need to replace it with this:

add_action( 'enqueue_block_editor_assets', function () use ( $class ) {

This will be updated with the next update, so you won't need to worry about it anymore.

You're welcome Francesco

This one was actually provided by one of our developers, not me, but you're welcome in his name also

If you have any further questions or issues, please feel free to open a new ticket, and we'll gladly help.