[Plugin: Contact Form 7 BWP reCAPTCHA Extension] Unknown captcha error

If you are using any kind of cache system try to empty that cache.

This error should never appear as a wrong challenge in recaptcha should show as error, empty or incorrect. So if is not a temporal problem with cache or a strange temporal problem then it will mean your hosting does not support the PHP recaptcha library used by Better WordPress reCAPTCHA, for example fsockopen function not able to do its job.

Any link to a form with the problem?

I deleted the both BWP-Plugins and reactivated the “old” wp-recaptcha-Plugins. Now everything works without any problems.

I prefer BWP-recaptcha than WP-recaptcha. But WP-recaptcha is another option and is not old, just another posible choice.

Anyway I don’t know if it is a good idea to refuse to investigate what was wrong because I’m not very sure it was a problem with BWP-recaptcha and maybe WP-recaptcha is just ignoring those kind of errors that BWP-recaptcha does not ignore and catch.

That kind of error probably appears when their is a problem of communication between the web server where the site is hosted and google recaptcha api server when trying to validate recaptchas. Maybe it was even just a temporal problem in your web server.

But well, I don’t know. I just mark this as resolved as we can’t know why you get that error.