Yes, I am also facing the same error. I tried but was unsuccessful to figure out the problem.
my command : wios -r -x 0 -d plughw:1,0 -c 6 -f 48000 -t 6 -o test.wav
Please do let me know on this post if you find a solution.
There is an alternative to wios. You can use Audacity software to record the multichannel audio data.