Member Rara Avis
Grinch is right. That username can't be added to the library and apparently can't even be used in a Search. I'm not sure any User functions, like email, will work.
In the next week or so, I'll change the software to not allow weird characters in new Usernames. But that's shutting the barn door after the horse has already left. It doesn't solve this problem, only addresses future ones.