ERROR: The Text area with id or name set to "content" was not found

I got the above error : “The Text area with id or name set to “content” was not found” when I attempted to create a slideshow after installation. I added a few pictures and input the code into the page to see if it would work anyway. No luck; it just gave me a loading circle. How do I fix this?

Thanks!

http://wordpress.org/plugins/slideshow-jquery-image-gallery/