Setting up WPMU DEV on my Second Site with Error Codes

I am trying to set up WPMU DEV on my second site. It is running beautifully on But now uploaded the plugin to and activated it. But trying to login on this site and getting error codes.

Here is the error code, I get:

Your server had a problem connecting to WPMU DEV: "cURL error 6: name lookup timed out". Please try again.

If this problem continues, please contact your host with this error message and ask:

"Is php on my server properly configured to be able to contact with a POST HTTP request via fsockopen or CURL?"

I am hosted on Site Ground and have contacted them, but they can't seem to help me.

Please assist me with this.