[Solved] Why does it always say "You entered an incorrect CAPTCHA. Please try again"
even if I enter correct CAPTCHA? and if there is no any CAPTCHA?
Please confirm that you're using the All In One WP Security plugin. If so, then the plugin has the following option "Enable Captcha On Comment Forms" option, in Dashboard > WP Security > SPAM Prevention > Comment SPAM admin page. In the case of the wpDiscuz plugin, it must be disabled. Just uncheck this option and everything will work fine.
Important: Please don't forget to press Ctrl+F5 (twice) on frontend before checking.