Hey There,
Thanks for writing in!
Make sure your site is validated. Once it is validated, go to your WordPress Dashboard>> AddOns>> Slider Revolution>> Install.
Once the Slider Revolution Plugin is installed, go to the Plugins section and Activate it from there.
You should be able to use this plugin afterwards. If this doesn’t help, you can even install it manually from the WordPress directory. For more information on this, you can follow the guidelines given in this link.
https://community.theme.co/kb/updating-your-theme-and-plugins/
Hope this helps, let us know if you need any more information on this.