I know this is old, but I reached out to them because I was having issues with CAN0 not coming up, and they advised me to copy the steps detailed here. MKS Monster8 v2 as a Can to USB bridge adapter | klipper_canbus (maz0r.github.io)
I did NOT use the 48kib bootloader, I used the 32, since the 48 was refusing to load CAN0, after I did that, it is all functioning. Not sure if they’ve changed, but following the MKS Monster guide worked perfectly for me.
I am also using a Bullseye image from here redrathnure/armbian-mkspi: Armbian Linux Build Framework (github.com)
