Problem loading files

Hello everyone! Aparently I have something going wrong with my Sonos plugin because my log files are showing some errors.
How can I fix this?

02 12/17/15 0:00:32.940 JobHandler_LuaUPnP::m_sMissingFile_set /etc/cmh-lu//ContentDirectory1.xml <0?77e9c320> 01 12/17/15 0:00:32.941 Device_LuaUPnP::CreateService can?t load /etc/cmh-lu//ContentDirectory1.xml for 66/192.168.2.20 ? Sonos PLAY:1 Media Server <0?77e9c320> 02 12/17/15 0:00:32.942 JobHandler_LuaUPnP::m_sMissingFile_set /etc/cmh-lu//ConnectionManager1.xml <0?77e9c320> 01 12/17/15 0:00:32.942 Device_LuaUPnP::CreateService can?t load /etc/cmh-lu//ConnectionManager1.xml for 66/192.168.2.20 ? Sonos PLAY:1 Media Server <0?77e9c320> 02 12/17/15 0:00:32.944 JobHandler_LuaUPnP::m_sMissingFile_set /etc/cmh-lu//ConnectionManager1.xml <0?77e9c320> 01 12/17/15 0:00:32.945 Device_LuaUPnP::CreateService can?t load /etc/cmh-lu//ConnectionManager1.xml for 67/Quarto ? Sonos PLAY:1 Media Renderer <0?77e9c320> 02 12/17/15 0:00:32.947 JobHandler_LuaUPnP::m_sMissingFile_set /etc/cmh-lu//Queue1.xml <0?77e9c320> 01 12/17/15 0:00:32.947 Device_LuaUPnP::CreateService can?t load /etc/cmh-lu//Queue1.xml for 67/Quarto ? Sonos PLAY:1 Media Renderer <0?77e9c320>

The plugin seems to work ok but every now and then it has some hicups. Maybe these missing files are the reason?
Thanks for your help!