What steps will reproduce the problem? Given an existing MUC room@muc.example.com send a voice request without joining first: <message to="room@muc.example.com" type="normal"> <x xmlns="jabber:x:data"> <field var="FORM_TYPE"> <value>http://jabber.org/protocol/muc#request</value> </field> </x> </message> What is the expected output? Some kind of error stanza probably. What do you see instead? 21:11:58 c2s5613c0ca3990 error Traceback[c2s]: plugins/muc/request.lib.lua:67: attempt to index a nil value (local 'occupant') stack traceback: plugins/muc/request.lib.lua:67: in method 'handle_role_request' plugins/muc/muc.lib.lua:1274: in function <plugins/muc/muc.lib.lua:1250> (...tail calls...) ./util/events.lua:79: in function <./util/events.lua:75> (...tail calls...) ./core/stanza_router.lua:188: in upvalue 'core_post_stanza' ./core/stanza_router.lua:128: in upvalue 'core_process_stanza' plugins/mod_c2s.lua:283: in upvalue 'func' ./util/async.lua:127: in function <./util/async.lua:125> What version of the product are you using? Reproduced on 0.11.0 forward including trunk, presumably since #655