Summary:
The `error` was not recognized as a string and React was not happy about it.
Change the `error` to a string explicitly. Also, add space between the error and the form box.
Reviewed By: jknoxville
Differential Revision: D18829862
fbshipit-source-id: 0474d411a95bab4bc4f62a3f3d3839029938a9e6