The most typical reason is the IP address being used on the system does not match what has been configured in the network.
1. Please run the diagsysedge utility and make a note of the IP Address the file shows.
2. Check the hosts file.
3. Ping -a 127.0.0.1
4. Ping -a <IP_Address>
5. Nslookup <hostname>
6. Ipconfig /all
Check if there are any discrepancies.
CA System Edge relies on a pre-configured network it does NO hostname resolution.