lpbugannounce attribute error

When the command *lp <bug number> is used, I receive the error:

Unhandled Error
Traceback (most recent call last):
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\internet\tcp.py", line
 460, in doRead
    rval = self.protocol.dataReceived(data)
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\words\protocols\irc.py
", line 2297, in dataReceived
    basic.LineReceiver.dataReceived(self, data.replace('\r', ''))
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\protocols\basic.py", l
ine 564, in dataReceived
    why = self.lineReceived(line)
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\words\protocols\irc.py
", line 2305, in lineReceived
    self.handleCommand(command, prefix, params)
--- <exception caught here> ---
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\words\protocols\irc.py
", line 2349, in handleCommand
    method(prefix, params)
  File "C:\Panda3D-1.7.2\python\lib\site-packages\twisted\words\protocols\irc.py
", line 1833, in irc_PRIVMSG
    self.privmsg(user, channel, message)
  File "C:\Users\chris\Desktop\bots\p1tr\lib\core.py", line 54, in privmsg
    self.factory.plugin_handler.handle(Message(self, channel, user, msg))
  File "C:\Users\chris\Desktop\bots\p1tr\lib\plugins.py", line 79, in handle
    answer = self.plugins[msg.keyword].privmsg(msg)
  File "C:\Users\chris\Desktop\bots\p1tr\lib\plugin.py", line 121, in privmsg
    return getattr(self, msg.keyword)(msg)
  File "C:\Users\chris\Desktop\bots\p1tr\plugins\launchpad.py", line 62, in lp
    self._bug_info(msg, bugstr, msg.reply_to)
  File "C:\Users\chris\Desktop\bots\p1tr\plugins\launchpad.py", line 131, in _bu
g_info
    direct_request = string.lower().startswith(bot.nickname.lower()) \
exceptions.AttributeError: Message instance has no attribute 'nickname'