mcu unable to connect on v-minion

Happy holidays everyone. After many times trying to fix this by myself I am seeking for help here.

My Minion is still not running because I get errors right after using the script for the minion configuration. Error is

mcu 'mcu': Unable to connect

and in the klippy log it says

mcu 'mcu': Unable to open serial port: [Errno 2] could not open port /dev/btt-octopus-11: [Errno 2] No such file or directory: '/dev/btt-octopus-11'
MCU error during connect

Did anyone run into the same error? I do have a minion with standard config. Octopus 1.1 board.
I went along every step of the documentation and cant find a way to fix this.