There should be changes in /boot/config.txt and /boot/cmdline.txt after enabling UART. What happens when you set /dev/ttyS0 or /dev/ttyAMA0 in openauto_controller_service.ini? Does the panel work after enabling UART in raspi-config?
Did you answered No for enabling serial console logging during UART setup in raspi-config?
Did you answered No for enabling serial console logging during UART setup in raspi-config?