That all sounds good. The „error“ is fine and should not hinder playback. It’s not part of the log, bust just of the command line options. The name is listed as the name of your Max2Play device. You should still be able to play to it, I have the same output. After starting playback on your phone you should get the following output:
#### Librespot Output ####
INFO:librespot: librespot 8f8eb8c (2018-02-28). Built on 2018-03-05. Build ID: 1ErnJKzS
INFO:librespot_core::session: Connecting to AP „gew1-accesspoint-b-kgs7.ap.spotify.com:4070“
INFO:librespot_core::session: Authenticated as „xxxxxxxxxxxxxxxxx“ !
INFO:librespot_playback::audio_backend::alsa: Using alsa sink
INFO:librespot_core::session: Country: „DE“