Please check your firewall. The ports 8081 and 443 must be enabled.
If it doesn’t help check next scenario:
Some users manually modify the HOSTS file in order to block activity of Internet advertisment. This modification effects on our internal services and prevents it from working properly. In other words if you block certain web addresses – our account supporting services are blocked as well. We have a workaround deleting next lines from HOSTS file.
127.0.0.1 www.google-analytics.com 127.0.0.1 google-analytics.com 127.0.0.1 ssl.google-analytics.com
This file can be found by the path below by default.
Edit it – remove mentioned lines and save. Then check if you can access our services.