failed to import acp5x use case configuration -2

[GitHub issues - opened]

alsa-project/alsa-ucm-conf issue #184 was opened from DocMAX:

docmax at steamdeck: ~ $ ALSA_CONFIG_UCM=/usr/share/alsa/ucm2/ alsaucm -c acp5x set _verb HiFi
ALSA lib main.c:1541:(snd_use_case_mgr_open) error: failed to import acp5x use case configuration -2
alsaucm: error failed to open sound card acp5x: No such file or directory

Why does it fail? I have the following directory set up:

/usr/share/alsa/ucm2/conf.d/acp5x/HiFi.conf
/usr/share/alsa/ucm2/conf.d/acp5x/acp5x.conf

Issue URL     : https://github.com/alsa-project/alsa-ucm-conf/issues/184
Repository URL: https://github.com/alsa-project/alsa-ucm-conf