WHMCS Integration: SSL connect error


I just installed the WHMCS integration plugin, and am fairly sure i have set it up correctly, but i get the error:

"WHMCS Integration: SSL connect error"

My WHMCS install is on the domain:


I have set the correct remote WHMCS host, and i have created the page/placed the [wcp_content] shortcode on said page. Still just getting the error.

Any idea on what the issue could be?