Error Message on iPhone - not charging

After updating my iPhone to iOS 13, when I connect my phone to the cable connected to the ZUS Smart Charger, it will work for a bit and then display a message that that accessory is not compatible for use. I unplug and reconnect and it will work for a while (each time different amount of times). All the other features still operate - location of parked car and mileage tracker?

Please advise?

Sometimes happen to me, if there is dust in the charging port of the iPhone. Maybe that’s causing it, because of a vaguely loose connection?