Volumio vs.IQAUDIO DAC+

I have a Raspberry Pi4 and IQAudio DAC+. When I play FLAC, it prints an error: Failed to open ALSA device.

I2S DAC settings: IQAudio Dac PLus
What else needs to be set up

Volumio 3 Issues?

Please see: Volumio 3 issues: hints and solutions before posting a new issue.
(You’ll need to cut and paste the link)

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