ReSpeaker 4-Mic problems with rec

Hello,
I bought a ReSpeaker 4-Mic and wanted to install Jarvis on my RPi4. If I use the comand stated on the website

arecord -Dac108 -f S32_LE -r 16000 -c 4 hello.wav

everything works fine.
But if I try to launch Jarvis I got the warning massage

rec WARN alsa: can't encode 0-bit Unknown or not applicable

This also occurs if I try to record with the command rec.
I could not find a solution for this problem jet, so maybe someone here could help me.