You should be able to click on the “Help” that appears after a few minutes on the Android App and input the IP address of the Core there or the 255.255.255.255 IP there. Do note, if you are unable to connect to your Core without performing this workaround, this usually means that there are some multicast issues on your network. We can take a look over in the Support category but you must fill out a ticket regarding your setup there: