I notice you've written "article: ESRI ArcGIS PRO 3.0.1" — are you asking me to about ArcGIS Pro version 3.0.1, or are you referencing an existing article you'd like me to read and discuss?
Your Activation Key is invalid
There are a couple reasons why this might have happened:
1) you don’t have an activation key and entered a fake one
2) you entered the wrong code
3.) You didn't sign up properly
Please double-check that you have downloaded your activation key according to the instructions in the tutorial video.