The slider has disappeared off my site and I get this message.

Revolution Slider Error: You have some jquery.js library include that comes after the revolution files js include.

This includes make eliminates the revolution slider libraries, and make it not work.

To fix it you can:

    1. In the Slider Settings -> Troubleshooting set option: Put JS Includes To Body option to true.

    2. Find the double jquery.js include and remove it.

I have no idea how to fix it as I know nothing about this type of thing, 

I logo in on my Mac and see dashboard and the page set up links at top.

Be kind I'm old....