Regarding WPMU Dev Trial version (buddy press activity +) plugin

Regarding WPMU Dev Trial version

I am facing some error, while trying to install WPMU Dev trial version settings.

Please check the following error:

***Error *****************************************

Your server had a problem connecting to WPMU DEV: "Failed to connect to premium.wpmudev.org port 443: Connection refused". 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 https://premium.wpmudev.org/api/dashboard/v1/ with a POST HTTP request via fsockopen or CURL?"