I bought 2 of the yocan products this year. One of them was in July and the other shortly after cause it stopped working. My yocan uni pro I bought after just shorted out on me. I've paid $50 between the two products and am very disappointed and dissatisfied with these products not working for more than a month or two.
The vape device short circuit error due to incorrect connection, please check the adapter and vape cartridge connections, and try to clean the contact points.
Pull the base of the coil out slight then reassemble the tank and make sure the coil is on tight. If the coil is on tightly and still reading atomizer short then you might have a bad coil. Sometimes there could be one or two bad/defective coils so try using a new coil from the pack to see if that is the issue.