Introduced for Wolfram Desktop and newer Mathematica versions.
Even with a valid purchase, errors occur. Here are the most common scenarios: wolfram product activation
Activating a Wolfram product is the essential first step to accessing powerful computational tools like Mathematica, Wolfram|One , and System Modeler. Starting with Version 14.0, the default and easiest way to activate desktop products is through a direct sign-in using your . Primary Activation Methods wolfram product activation
This is the most frequent error. A single-user license might allow only 2 or 4 activations. If you have replaced your laptop or reformatted your hard drive, the server may not recognize the machine as the same one. wolfram product activation