Subsites are not working after SSL certificate is installed onthe primary domain of the network


I have recently installed SSL certificate to my main site by hostgator.

But the main site is still working fine, but the sub-sites are not working anymore, you can check one of my site here at:

What seems to be the problem, as I have installed multisite network to the main domain where anyone can create free site and can map their domain, but with this how can work and all.

So please try to solve my issue asap.