If I operate the Z-N528 with a HDMI dongle, a warning pop-up “Android Auto cannot connect” shows up when I start Google Android Auto, e.g. I can spot a screen overlay?

The deployed hardware platform of the Z-N528 cannot process two external A/V streams coming from the smartphone. Z-N528 device use in practice is thus restricted as follows: Operate the device with the smartphone and the HDMI dongle. Alternatively, use the Android Auto function of the Z-N528 without HDMI dongle.