I am running into the same problem, the mechanic is fixing it now. Basically, the battery temp sensor fried when we changed the battery. Well without the temp sensor the car has no electronics, it will jump start and run but after you take the jump box away the electronics all go dead. So it is a 70-100 dollar part but I would change it, and hopefully next time we learn how to change the battery and temp sensor without breaking it.
https://www.rockauto.com/en/catalog/dodge,2015,journey,3.6l+v6,3309784,electrical,battery+temperature+sensor,10478