This error occurs when the communication protocol selected in the dropdown menu does not match the architecture of the car. Switch between the and CAN buttons on the main UI until the vehicle's modules respond. Additionally, make sure your car battery is in good health; a voltage drop below 11.5V during an EEPROM read can break the transmission cycle.
“You need version 3.6 for newer VAG cars.” Correct only up to 2012 – For MQB platform (Golf 7, 2013+), KCAN Commander does not work; you need ODIS or TCP module. vag kcan commander 36 top download repack