W3 Validation error

Can you please post a link to the actual page? Did WordPress create that textarea field? If so, where? The valid values for the autocomplete attribute are either yes or no.

Something very strange with the comment field on that page. I installed and activated the same theme (GeneratePress), and I didn’t see the same autocomplete attribute in the comment field on my site.

But what is interesting about your page is that there’s a hidden textarea field right next to the comment textarea (well, it’s not really “hidden” but it’s sized to 1px by 1px so you can’t see it), and it’s assigned a peculiar ID by some javascript code. And it’s the comment field plus this hidden field which both contain the autocomplete attribute. I don’t know what might have put that hidden field there, or what it’s used for but I’m guessing whatever did (maybe a plugin?) is also responsible for adding the autocomplete attribute to the comment field. What you might try is disabling your plugins to see if that attribute disappears.