Dashboard won't connect.

I tried installing Dashboard through the Hub. Everything seems fine, but every plugin install fails.
In WP-Admin Dashboard doesn't show on the left menu, but is present under plugins.
So I uninstalled the plugin on the site ( CindyPate.com ) removed it from Hub, downloaded the plugin and manually installed it.
Now it shows on the left menu.

When Trying to activate I get:

Your server had a problem connecting to WPMU DEV: "cURL error 28: Operation timed out after 15001 milliseconds with 0 bytes received". Please try again.

SiteGround support is quite adamant that their cURL settings are perfect and there is no problem on their end.

What should I try next?