Error when config jwt authentication

Hi @damencho,
I try to config jwt authentication following https://github.com/jitsi/lib-jitsi-meet/blob/master/doc/tokens.md . Then i met some error on prosody log and i can not create a meeting with https://…/roomname?jwt=…
Pls help me to check it.

Error is:
Dec 09 14:32:45 general info Hello and welcome to Prosody version trunk nightly build 747 (2017-02-19, 428d4abee723)
Dec 09 14:32:45 general info Prosody is using the select backend for connection handling
Dec 09 14:32:45 modulemanager error Error initializing module ‘auth_token’ on ‘domain’: /usr/lib/prosody/…/…/bin/prosody:185: module ‘basexx’ not found:No LuaRocks module found for basexx
no field package.preload[‘basexx’]
no file ‘/usr/lib/prosody/basexx.lua’
no file ‘/usr/local/share/lua/5.1/basexx.lua’
no file ‘/usr/local/share/lua/5.1/basexx/init.lua’
no file ‘/usr/local/lib/lua/5.1/basexx.lua’
no file ‘/usr/local/lib/lua/5.1/basexx/init.lua’
no file ‘/usr/share/lua/5.1/basexx.lua’
no file ‘/usr/share/lua/5.1/basexx/init.lua’
no file ‘/var/lib/prosody/.luarocks/share/lua/5.1/basexx.lua’
no file ‘/var/lib/prosody/.luarocks/share/lua/5.1/basexx/init.lua’
no file ‘/usr/lib/prosody/basexx.so’
no file ‘/usr/local/lib/lua/5.1/basexx.so’
no file ‘/usr/lib/x86_64-linux-gnu/lua/5.1/basexx.so’
no file ‘/usr/lib/lua/5.1/basexx.so’
no file ‘/usr/local/lib/lua/5.1/loadall.so’
no file ‘/var/lib/prosody/.luarocks/lib/lua/5.1/basexx.so’
stack traceback:
/usr/lib/prosody/core/modulemanager.lua:31: in function </usr/lib/prosody/core/modulemanager.lua:31>
[C]: in function ‘_real_require’
/usr/lib/prosody/…/…/bin/prosody:185: in function ‘require’
…/share/jitsi-meet/prosody-plugins/token/util.lib.lua:4: in main chunk
(tail call): ?
…/share/jitsi-meet/prosody-plugins/mod_auth_token.lua:8: in main chunk
(tail call): ?
[C]: in function ‘xpcall’
/usr/lib/prosody/core/modulemanager.lua:31: in function ‘pcall’
/usr/lib/prosody/core/modulemanager.lua:176: in function ‘do_load_module’
/usr/lib/prosody/core/modulemanager.lua:254: in function ‘load’
/usr/lib/prosody/core/usermanager.lua:66: in function ‘?’
/usr/lib/prosody/util/events.lua:78: in function </usr/lib/prosody/util/events.lua:74>
(tail call): ?
/usr/lib/prosody/core/hostmanager.lua:104: in function ‘activate’
/usr/lib/prosody/core/hostmanager.lua:57: in function ‘?’
/usr/lib/prosody/util/events.lua:78: in function </usr/lib/prosody/util/events.lua:74>
(tail call): ?
/usr/lib/prosody/…/…/bin/prosody:354: in function ‘prepare_to_start’
/usr/lib/prosody/…/…/bin/prosody:423: in main chunk
[C]: ?
Dec 09 14:32:45 portmanager info Activated service ‘http’ on [::]:5280, []:5280
Dec 09 14:32:45 portmanager info Activated service ‘https’ on [::]:5281, [
]:5281
Dec 09 14:32:45 portmanager info Activated service ‘c2s’ on [::]:5222, []:5222
Dec 09 14:32:45 portmanager info Activated service ‘legacy_ssl’ on no ports
Dec 09 14:32:45 portmanager info Activated service ‘s2s’ on [::]:5269, [
]:5269

Thanks,