reCaptcha2 not work

I would suggest that you double check:

• your keys,
• that the keys entered don’t have any trailing whitespace,
• that you haven’t inadvertently switched the keys (i.e. site/secret aren’t switched)
• that your keys are for the domain you are using it on

Also, to be clear, keys need to be entered in the WP-Members Captcha tab.

Some servers not support file_get_contents function (security reasons).
Solution to resolve this problem below.

Edit file register.php
Comment line 211
Above line 211 paste this code:

function captcha_curl_load( $url )
{
curl_setopt($ch=curl_init(), CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);
curl_close($ch);
return $response;
}

$url = "https://www.google.com/recaptcha/api/siteverify?secret=" . $privatekey . "&response=" . $captcha . "&remoteip=" . $_SERVER['REMOTE_ADDR'];

$response = captcha_curl_load( $url );

Perhaps You change verify recaptcha key method to curl into wp-members script on the occasion another update?

Using cURL is actually not the ideal solution – it basically replaces one problem with another since, like file_get_contents(), not every server has this enabled (see this thread for a more detailed explanation).

The better solution is using wp_remote_fopen() which is now implemented in version 3.1.4.2.

Great. Works.