Unable to record from the Matrix Voice board using arecord

Hi!

I’ve been trying to record audio with the Matrix Voice board.
I followed the required steps to install the Matrix HAL and the MatrixIO Kernel Modules for the Raspberry Pi 3B+

Every time I run the command

arecord -f S16_LE -Dplug:all_channels -c 8 all.wav

I get a bunch of errors (screenshot attached)
ErrMat1

I do not know what is wrong, I tried with fresh Raspberry Pi OS (Buster) images and I’m still getting the same errors.

I would like to know how I can get this running.

Things I’ve done to make sure the board works:

  1. Running the everloop examples
  2. Checking the FPGA firmware