Hello,

I have tested the Slider Revolution, I have added a layer and it saves: https://gyazo.com/6aa309f5ee046a51d24a7e77db55a1bd

I would recommend uploading a slider from a demo and editing it as per your needs or refer this manual to create your slider: https://revolution.themepunch.com/joomla/documentation/

If you have any questions please feel free to contact us.

Best Regards