I'm encountering the same problem as mentioned in two other postings-- one thread has been closed; no one has responded to the other. So, in the past year, no one has a solution for this error message?
WP_Error Object ( [errors] => Array ( [http_request_failed] => Array (  => couldn't connect to host ) ) [error_data] => Array ( ) )
The plugin works for other functions, hardening, etc. but will not perform a Surui Scan of the site. I'm running WordPress 3.6.1.