The follow-up quest, To Go'shek Farm, doesn't always appear on the map. If you're using an auto turn-in/accept addon, this can be especially confusing since you won't get a map marker.
The coordinates (56, 59), where you need to go, aren't always reliable either due to phasing (for example if you are using tomtom).
The quest turn-in NPC is still at Go'Shek Farm, slightly south of the "R" in the word "Farm" on the map. If you can't see the quest marker, head there anyway.
If it still doesn't appear, type /reload, follow the flying instructions, and return to Go'Shek Farm. That usually makes the quest show up. Then continue with the quests at Go'Shek Farm. They may not appear immediately either due to phasing. If that happens, try /reload or simply wait a minute, and they should show up.