VERIFIED SOLUTION i

Error starting MapInfo Pro Viewer: your subscription does not have any valid features

When starting the MapInfo Viewer, an error message is generated:
You must be logged in to use a subscription version of MapInfo Pro. 
Choose OK to re-enter credentials or Cancel to exit the application.
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Version MapInfo Pro v17.0.2 now includes the full licensed serial number version of MapInfo Pro and a new Viewer.

When opening the Viewer for the first time, a "Sign In" screen will prompt to enter an email and password.  If a customer does not have an email and password, they can create a subscription by clicking the link to: "Sign up now"
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If that dialog is closed without signing in or creating a new subscription by clicking "sign up now", the error stating the "subscription does not have any valid features" and the Viewer will close.

From the MapInfo Pro 17.0.2 release notes:
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Starting with version 17.0.2, MapInfo Pro users who register with a Pitney Bowes online account are able to run MapInfo Pro in a connected Viewer Only (subscription) mode. The MapInfo Pro installer adds a shortcut (Icon) to the Windows Start Menu to start MapInfo Pro in Viewer (subscription) mode. This icon is located next to the regular MapInfo Pro Start Menu shortcut.

MapInfo Pro Viewer
Starting with version 17.0.2, MapInfo Pro users who register with a Pitney Bowes online account are able to run MapInfo Pro in a connected Viewer Only (subscription) mode.
In order to run the Viewer version of MapInfo Pro, you must first create an online account. You cando this from the MapInfo Pro Backstage Services Tab, when you first run MapInfo Pro Viewer, or from here: 
https://signup.pitneybowes.com/signup/mipro  (free)
and
https://signup.pitneybowes.com/signup/plans/mipro (paid)

See Capabilities and Limitations on page 18 for more information on the MapInfo Pro Viewer features.
UPDATED:  January 3, 2019