Prosody component error

gistfile1.txt

Jun 10 09:22:46 mod_component	error	Traceback[component]: /usr/lib/prosody/core/loggingmanager.lua:262: bad argument #3 to 'format' (string expected, got nil)
stack traceback:
	[C]: in function 'format'
	/usr/lib/prosody/core/loggingmanager.lua:262: in function '?'
	/usr/lib/prosody/util/logger.lua:48: in function </usr/lib/prosody/util/logger.lua:46>
	(tail call): ?
	/usr/lib/prosody/core/stanza_router.lua:39: in function 'handle_unhandled_stanza'
	/usr/lib/prosody/core/stanza_router.lua:149: in function </usr/lib/prosody/core/stanza_router.lua:55>
	(tail call): ?
	[C]: in function 'xpcall'
	/usr/lib/prosody/modules/mod_component.lua:223: in function 'cb_handlestanza'
	/usr/lib/prosody/util/xmppstream.lua:187: in function </usr/lib/prosody/util/xmppstream.lua:167>
	[C]: in function 'parse'
	/usr/lib/prosody/util/xmppstream.lua:255: in function 'feed'
	/usr/lib/prosody/modules/mod_component.lua:292: in function 'data'
	/usr/lib/prosody/modules/mod_component.lua:304: in function </usr/lib/prosody/modules/mod_component.lua:302>
	(tail call): ?
	/usr/lib/prosody/net/server_select.lua:848: in function </usr/lib/prosody/net/server_select.lua:830>
	[C]: in function 'xpcall'
	/usr/bin/prosody:373: in function 'loop'
	/usr/bin/prosody:403: in main chunk
	[C]: ?