One of my customer is trying to install Sql server reporting services 2019 and during installation customer gets 2 options; to select as free edition or activate through product key. However, customer states that he does not have a product key since he's using Sql server std core edition and hence unable to activate the SSRS 2019 product. Can anyone pls advise how SSRS 2019 can be activated if customer has Sql server std Core edition?