Hi,
The message you got have not link with the fact that you have a SSL in your website or not.
The error message you have indicates that the "file_get_content" on the URL "
www.google.com/recaptcha/api/siteverify
" is not working properly and it return no content at all.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.