After installation SSL on your web hosting account you may not be able to browse your site.
This problem is caused by the SSL installation which needs a DNS change of your domain’s A record. After the SSL installation you could be still resolving your domain with the previous DNS settings. Usually those changes should happen instantly but it is still possible to access your website using cached DNS information.
You should permit some times for DNS change to propagate and get result. After that you will be capable to access your site without any problems.
It is also a excellent concept in such cases to clear up your browser’s cache and your local DNS cache.