When you try to activate Tableau Server or Tableau Desktop, one of the following errors occur:
Invalid Product Key
The product key is invalid. To avoid a mistyped key, copy the product key directly from the Tableau Customer Portal or from your Tableau Invoice. Unspecified exception <exception_number>
Or (specific for Tableau Prep)
This product key doesn't apply to Tableau Prep. Enter a different product key or contact your Customer Account representative.