In your PHP configuration (php.ini or equivalent) the directive allow_url_fopen
has been turned off. For OJS to be able to verify the ReCAPTCHA response, it need to be able to make a direct connection to Google over HTTPS. This is implemented via an fopen
call to a Google URL.
If your system administrator or hosting provide can enable the PHP setting allow_url_fopen
, this may resolve your problem.