If installation fails, check for these issues.
DNS is misconfigured
Verify that agents can reach the master hostname you chose during installation.
Verify that the master can reach itself at the master hostname you chose during installation.
If the master and console components are on different servers, verify that they can communicate with each other.
Security settings are misconfigured
On your master, verify that inbound traffic is allowed on ports 8140, 61613, and 443.
If your master has multiple network interfaces, verify that the master allows traffic via the IP address that its valid DNS names resolve to, not just via an internal interface.