Can't resolve CAPTCHA plugin error!

-- HikaShop version -- : 4.4.4
-- Joomla version -- : 3.9.27
-- PHP version -- : 7.4.23
-- Browser(s) name and version -- : Firefox
-- Error-message(debug-mod must be tuned on) -- : The CAPTCHA solution was incorrect

Hallo there. I was quite happy that my site was almost finished, but i purchased the essential version and began my troubles.

When i try to checkout, the CAPTCHA plugin give me always the error SOLUTION WAS INCORRECT at the 2nd time. In the first registration page, instead, the error is "Non è stato possibile verificare che non sei un robot" (isn't possibly verify that you're not a robot).

So, i TRIED every solution proposed in the forum: disable all captcha (joomla and hika), mantain only hika captcha, only joomla, and so on...
Nothing resolved.

I downloaded the 4.4.4 version and this became my horror. Before was 4.2.2, and everything was ok, i could disabled and checkout worked fine. I downloaded the new hika captcha plugin and installed, configure and so on. But didn't work anymore.

Please help soon, i wanted launch my site already 2 weeks ago!

I was trying to accomodate, and disabled for error (wanna try without captcha at all, but didn't work).

So now i enable only HIKA plugin, and disabled and configured joomla without nativa CAPTCHA plugin.
I double checked even the Joomla Contact options, disabled even there, and even on every menu's voices.

Enabled the Hika recaptcha plugin enabled again, i can see in first page of checkout, but still getting the same error.
Please check again, i'm gonna crazy for this.

Ok, seem i've resolved.

The issue was created from the K2 blog settings, that has another time a CAPTCHA plugin configuration in its inside module.
So now it's working.

However it's a really a strange process...why don't use the native captcha? thanks in advance.