When I start up a web browser and then start up the Enterprise Server Administration web page, and then click on the "Edit" button of the started Enterprise Server region, then click on the "Control" tab and finally click on the "ES Monitor & Control" (ESMAC) button, I get an “Internet Explorer cannot display the webpage” error message.

In this scenario, there was a problem with the ESMAC link.  The link points to

http://127.0.0.1:48509/esmac/casrdo5?ReferringUID=1.2.840.5043.01.025.a19e7b8.129845382621033554432&Cookie:MF_CLIENT=mfuser&MF_SESSION=4d9954a4&MF_CONTACT=1302005103

where 127.0.0.1 is a local IP, so it would always fail unless you had that region running on your own
computer.

MFDS reports the IP address as 127.0.0.1 (i.e. localhost).  If MFDS thinks that’s the IP address then all
the links are going to use that.

Check the /etc/hosts file.  127.0.0.1 should not be reported as the base host address on a healthily
configured system.

Run the "hostname" command, what's the output?

E.g.:     
      > hostname
      > cobserv

Find the IP address of the server using the "ping" hostname command.

E.g.:
      > ping cobserv
      > 174.10.39.200

Is there an entry in the hosts file to match the IP address with the hostname? If not, put the IP address on
the left hand column and put the hostname on the right hand column.

E.g. put this entry in the /etc/hosts file:
     174.10.39.200             cobserv

This will resolve the IP address that MFDS should be using.