TSM initialization window does not render in server-side web browser window

Issue

During the Tableau Server 2018.2 Windows install process, when loading https://<servername>:8850 for the first time, the page does not render and install cannot continue.

Environment

Tableau Server 2018.2.1
Windows Server 2012

Resolution

Option 1
Ensure that the actual server https://<hostname> is in the "trusted sites" list (https://localhost is not sufficient, as the installer process will load the hostname by default).
Option 2
Use a supported browser other than Internet Explorer.

Cause

Some configurations of Internet Explorer in Windows Server installs have Protected Mode enabled and are locked down in such a way that they will not load the TSM panel via the machine's hostname.