ALSA error when running snakeoil3_gym.py

[wjh601]

I have installed gym_torcs and opened TORCS server.
But the server is closed with error messages after I run

$ python snakeoil3_gym.py

Error message is

$ torcs -vision

Image generation is ON!
Visual Properties Report
------------------------
Compatibility mode, properties unknown.
Waiting for request on port 3101
ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': No such file or directory
terminate called after throwing an instance of 'char const*'
/usr/local/bin/torcs: line 53:  4370 Aborted                 (core dumped) $LIBDIR/torcs-bin -l $LOCAL_CONF -L $LIBDIR -D $DATADIR $*

Can I ask for some help with this problem?
I am working on the remote server with OS Ubuntu 18.04.4 LTS and A5000 GPU.

[red-fox1]

turn off the game sound may help