Only? ...the most important errors when BCM Max is retrofited.
Actually they are more errors/faults, but your VCDS did not detect them (BCM coding, etc, etc).
You must feed the BCM (T73a/63 and T73b/68) with a +30 signal (Battery-fuses-BCM) and add wires from the BCM to the lights with intercalated fuses (OEM way).
Currently, an important part of the lights of your Citigo go through the light switch exclusively, so they can not be managed by the BCM for automatic lights. As simple as that.