There maybe cases wherein Spotfire Cloud login to analyst may not work and error out as below:

All supported Operating Systems

- TIBCO Cloud is configured for web authentication, which opens a Web Browser and credentials need to be provided as soon a Spotfire analyst is launched.
- The Internet/web browser that opens here is the default one that is set on the machine/operating system.
- The issue is generally seen in case where the machine's default web browser is set to Microsoft EDGE.
- Change the machines default internet browser to Google Chrome, Firefox or Internet explorer and test the behavior. This should address the issue.

NOTE: This issue may not be seen everytime using Microsoft Edge but can be seen in some user environments.

This article will help resolve ERROR "Can't reach this page" which maybe seen when logging into Spotfire Cloud.

How to change your default browser in Windows 10
https://support.microsoft.com/en-in/help/4028606/windows-10-change-your-default-browser