there are no solution for this problem because it's not your fault.
it's not your connection problem but it was the server itself,
you can not access the site no matter what,because the server is down.
i encountered it yesterday and today,after a few minutes later on the site is up but a few minutes later the site is down.
just wait,they will fix it as soon as possible.
do not worry
server work well But pages load take long time
i can access to this site but site load slowly
so this is global problem