Preflight fail, live view not supported

DJI Phantom 4, Galaxy 7 edge no sim card
I could not pass the preflight last week. It said something like "live view not supported. I’m sorry I didn’t write it down.
It works today by the house. Don’t know if the WiFi helps.
Any ideas on what went wrong. Litchi worked that day. I was a quarter mile away from a cell tower.
Thank you

That device was released in 2016 and is not officially supported.