-24 error code on activation

[nick Nevels]

tried to activate product after a hard drive crash and reinstallation of windows.  using my serial # on license portal " Activating Nitro Pro | Nitro (gonitro.com) " it says I have 2 activations available, w/ ) activated currently, but I get a "-24:Activation Error" when I enter that same serial # into the reinstalled program activation window.  I am installing Nitro Pro 12 downloaded from the link in my original email i received when i purchased the program initially several years ago. 

[Reymund Oyong]

Greetings @nick Nevels

Thank you for reaching out through our Community Forums!

Please note that we no longer support Nitro Pro 12 and older versions as these versions have reached the End of Life (see Sunset Policy) and their activation servers have been shut down. 

To upgrade to the latest version with a discounted price, please visit our Upgrade page at https://www.gonitro.com/support/upgrade 

We recommend upgrading to our latest version, Nitro PDF Pro 14, which comes with significant stability and security improvements and many feature enhancements, particularly in Conversion, OCR, and Accessibility functions. 

Kind regards,

[nick Nevels]

Thanks for the update on the requirement to upgrade, unfortunately, I am unable to upgrade using my serial number, I get the following error :  We were unable to validate your serial number. Please ensure you entered it correctly. If you believe you are eligible for an upgrade, please leave a post on our Community Forum and update us with your issue.

I copy pasted the number as well as entered them manually to insure they were correct, neither work.  The serial # is for Nitro Pro 12. Purchased in 2019.