Revolution Slider Error: Slider with alias “slider-name” not found

This error message means that the slider you are referring for does not exists and cannot be loaded.
Here’s an example of what this error looks like:

Usually, this error happens if you have not imported sliders together with premade websites demo content.

To fix this, please follow to The7-> Premade websites and import sliders for corresponding demo:

If the page is updated before importing sliders , slider name will be changed to “none” and appears error like this Slider with alias “none” not found.
In such a case you will need to edit the page, and  manually select new imported slider.

This slider can be placed directly on the page as a shortcode:  

Or can be set as part of the header: edit your page, and in the “Page Header Options” you can change the slider