I have found some bugs and now it seems to me that I'm not able to complete the game because of a bug
I lost in the airship and got teleported to current path. The problem is that I never visited current path because I'm not that far with the story so now I was there at Team Earth and had to go to Mount Krystal and when I came out on top of Mount Krystal, there was this event with the ranger, Kevin and Nicolas
after the event was over, I saw that the Ranger says nothing, when I try to speak with her and Kevin too, so I tried to leave and then, the event where Nicolas leaves starts again and it's impossible for me to leave now because I have 5 badges and I'm not able to use Fly because I need the 6th badge :/
edit: I managed it to get back to the airship, I just reloaded a save state and when I was in front of Mount Krystal, I just went all the way to Rintah Town, but I still think that it wasn't thought that you get teleported to current path after loosing on the airship