Getting error message "The content you wanted to modify was too big or small to fit on the canvas"

Please help me, I have been getting this error message after adding a certain photograph to my prezi. I am new to Prezi, and after reading many threads pertaining to this topic, I now realize that there should not be too great of size difference in the objects on the canvas, but it looks like I am stuck unable to make any edits.

Here is my Prezi URL: http://prezi.com/xs3f_tazsaer/edit/#4...

I am using the online editor in Chrome. My Flash player is up to date. Please let me know what to do here.