Why am I getting the message: "This NComputing device is not authorized to use the version of vSpace Pro to which you are connecting"?

We have an article that explains this in detail. We encourage you to read it carefully:
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This NComputing device is not authorized to use the version of vSpace Pro to which you are connecting...
Message Context If you see this message when using your NComputing unit, your NComputing device(s) (L250, L300 or M300) was manufactured prior to January 1st, 2015. You can quickly check the date of manufacturing by looking on the sticker under the ...
How to Check for vSpace Pro Compliance
Introduction When using vSpace Pro Enterprise, to ensure uninterrupted service and full functionality of your environment, your deployment must be compliant with NComputing’s licensing policy. Compliance primarily revolves around having an active ...
What is the difference between vSpace pro AMP licensing and vSpace Pro Aged Device Connection licensing?
Overview The Annual Maintenance Program (AMP) is a subscription service that provides customers with access to the latest vSpace Pro Enterprise, enhanced technical support, and additional licensing benefits. Additionally, AMP also enables continued ...
Understanding AMP Licensing: vSpace AMP vs. Device AMP
Introduction The Annual Maintenance Program (AMP) from NComputing is a family of support and software maintenance plans designed to enhance the value of your NComputing environment. However, it's important to understand that there are two distinct ...
Device shows a black screen when connecting to vSpace Pro and returns to Server List menu.
This article assumes that you are using vSpace Pro Enterprise, or 11.3.2 LTS and are using L250, L300 or M300. Any other version of vSpace, as of the writing of this article is not supported. If your terminal displays this behavior, the device was ...