[ovirt-users] Disconnected Server has closed the connection.

It seems that the installation is all done, but I have a problem. it takes very long to open the web pages, plus it disconnect all the time. it is impossible to do anything. I can ping the hostname as I set up a sub-domain for it. to be honest, I am new to this and it took me days to get to this point. I think there are some issues with my network settings. if there are any oVirt experts that can check my installation and give me advice about how to improve it, it will be greatly appreciated. I have done an "Installing oVirt as a self-hosted engine using the Cockpit web interface"