When we tried to open the two below appliances via the browser we are getting 404 error using the hostname, but they are accessible via IP address.
Release : 3.4
Component : PRIVILEGED ACCESS MANAGEMENT
If more users than just yourself are having the issue, please check DNS issues with your networking team.
If this is a problem with just your local workstation, you can try
ipconfig /flushdns
then try to reach the servers.