む
2017-04-18T02:14:29.920590+00:00 app[web.1]: [68902273-70ab-462c-9245-42c2bf9bc2e0] method=GET path=/.well-known/webfinger format=json controller=WellKnown::WebfingerController action=show status=500 error='NoMethodError: undefined method `to_webfinger_s' for nil:NilClass' duration=14.73 view=0.00 db=0.00
I had to remove the @ prefix on my user name.