It could probably be that your server/hosts takes a bit time to contact wordpress api.
This only applies if you have your own server or vps, if not, ask your host admin for this
1. Ping api.www.ads-software.com, it will be 72.233.56.139, if it is reachable then,
2. Edit your host file vi /etc/hosts
3. Add in this line
72.233.56.139 api.www.ads-software.com
4. Save :wq
Then check if it works. NOTE: this is the method that works for me, i cannot guarantee that it will work in your case. Thanks and God Bless.