Have him download the phone app. Ask him for a pic of his main login menu. It'll look like this. If the circles aren't green, it isn't ready yet. Depending on host site it could be 30min to two weeks depending on demand and availability.
Make. Sher you have the right map selected pc unofficial if you have that try updating ur consol or the game switch it back and forth between prim and normal and if that fails contact server company