Addresses cannot be hidden because Mcrypt is not installed.

Error Type: 
Contributed Module
Module: 
Severity: 
Error
Origin: 
drupal_set_message
File name: 
recaptcha_mailhide.module
Description: 

The Recaptcha module has a feature called Mailhide that allows you to protect the display of email addresses until a user has completed a reCaptcha challenge in order to reduce spam. This error message is telling you that the module is not able to operate correctly meaning that your email addresses will remain exposed to spam.

Cause: 

The Mailhide feature relies on a PHP module called mcrypt, which has a function called mcrypt_encrypt(). Your server does not have this PHP module installed in a working fashion meaning the reCaptcha module is not able to encrypt data in turn meaning it is not able to send requests to Google's mailhide API.

Solution: 

To solve this problem all you need to do is install the mcrypt PHP module:

http://php.net/manual/en/mcrypt.setup.php

Expedite

Our aim is to add enough detailed information to each of the Drupal error messages that Drupal developers will be able to fix their own problems. This exercise will take some time to complete, at the last count we had almost 700 error messages in the system.

If your site is suffering from this error message please contact us and ask us to expedite the solution to this error and we will do our best to add a solution as soon as possible.