In an Android app, if the time is not set correctly, the following exception will occur during Twitter authentication.

Received authentication challenge is null
Relevant discussions can be found on the Internet at:
  http://www.google.co.jp/search?q=10f5ada3 or
  http://www.google.co.jp/search?q=e574403a
TwitterException{exceptionCode=[10f5ada3-e574403a b8c63e52-c913c2cc], statusCode=-1, message=null, code=-1, retryAfter=-1, rateLimitStatus=null, version=3.0.3}

During testing, I had left the time setting set to a future time, which caused this error…

At least it wasn’t a bug, so that’s good.

That’s all from the Gemba.