Coursepress errors appearing on front page, and setting up plugin

I am trying to set up a site where my client can sell her video courses to her customers easily. The videos we will use are vimeo embedded videos. I have started setting it up, but have run into problems with errors on the home page after I added a shortcode to list the videos on the home page thecrystalgarden.net. Also I want people to be able to buy multiple courses and only have one login, can i do this with coursepress?