[Client] Summoner Name Change to "Summoner" results in a Client Freeze

A rather random bug,~~ I tried other names but never got the error~~, I repeated the process and restarted the client and was greated with the same error every time.

Reproduction Process:

1. In the League of Legends Client go to store/account
2. Select "Summoner Name Change"
3. Insert "Summoner" into the box and press "Check Name"

You will be greated with an Adobe Air "200" error. This will freeze the client until the Error box has been exited.

Here I have provided a screenshot. http://prntscr.com/8rs0hl

EDIT: I tried this with misc random characters [English] and was greated with "20" and such errors.