Hi, i've recently enabled K2 comments on the new website i'm working on, but when i try to submit a comment i get this warning:

"The anti-spam settings for this website are not yet properly configured and comments cannot yet be published.
Please notify the site administrator :)"

I do not have google recaptcha enabled since i'm using the CleanTalk plugin, and so far it hasn't disappointed me once.
But the issue persist even if i flag recaptcha enabled.
Below, a screenshot of my k2 settings.
ibb.co/09xJs4z

Here's an example page where you can see the form

valpelliceoutdoor.it/attivita/trekking/bobbio-pellice/anello-borgate-e-foreste-attorno-a-bobbio-pellice

As you can see i did some basic edits on the item_comments_form.php file in the override, such as deleting the "your website" label and input and moving "your name" and "your mail" on a single row, but i doubt this is causing any issue.