Mumbletune error

Hello !

I get an error at messages.rb, connection.rb, client.rb :

[email protected]*****:~/mumbletune# bin/mumbletune -c conf.example.yaml

Connected to Mumble server at mumble.oh-my-games.com.
/var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/messages.rb:54:in
const_get': wrong constant name (NameError) from /var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/messages.rb:54:intype_to_class’
from
/var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/messages.rb:58:in
raw_to_obj' from /var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/connection.rb:80:inmessage_raw’
from
/var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/connection.rb:34:in
read_message' from /var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/client.rb:124:inread’
from
/var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/client.rb:120:in
block (2 levels) in spawn_thread' from /var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/client.rb:120:inloop’
from
/var/lib/gems/2.1.0/bundler/gems/mumble-ruby-8a557f55d2ba/lib/mumble-ruby/client.rb:120:in
`block in spawn_thread’

WTF, how to fix it please ?
Thx