The Narratives for Tableau extension works with Tableau Desktop and Server 2018.2 above.
For the Narratives for Tableau extension, additional requirements are:
1) Access to the Internet. The Narratives for Tableau extension operates as a web service. Therefore, your Tableau dashboard will be sending data to, and receiving narratives back, from the cloud. Make sure any firewall or network rules you have set up allow you communicate with the internet. Two sites will need to be accessible:
3) Google Chrome. Narratives for Tableau is only supported on Google Chrome