Joomla! -- 3.10.11
CB -- 2.7.4+build.2022.12.07.19.10.12.f06961ef4
CB Subs -- 4.6.1+build.2022.12.07.19.01.29.fbff56452
CB Anti-Spam - 5.0.0+build.2022.10.17.14.49.55.7f6191b41

We have the CB Anti-Spam plugin configured to use Invisible ReCaptcha. We also have the CB Anti-Spam field configured to use Invisible ReCaptcha and appear on Registration.

Invisible ReCaptcha loads on the Registration form without issue and the badge can be seen on the page. It's not until the registration form is submitted that an error is visible, which states "Security: Invalid Captcha Code". That's odd since it wouldn't apply to an Invisible ReCaptcha and there are no other captcha fields in use on the registration form. Also, unpublishing the CB Anti-Spam field resolved the error ... but, of course, it also removes our Invisible ReCaptcha.

 

PHP 7.4.33

On a couple of tests, probably as a result of my attempting several times, the Invisible ReCaptcha tested my submission with the popup "choose this object" squares, however, the page reloaded and displayed the "invalid captcha code" message before it was possible to make any selections in the popup.

I assume you published the anti-spam field first? No, nothing in the browser blocking it. And, the issue was first reported by our client because his customers were contacting him about being unable to get past the captcha.