I found a softlock that could be caused by talking to the guy in front of this building facing this direction. I think a good fix would be moving the NPC to the very right.
In addition, I think I found the music producer? But he only talks about his daughter. If that wasn't him, then I still couldn't find him!
UPDATE: It wasn't him. He just so happened to share the same sprite as the guy I'm looking for. Are you sure you added a event to add the producer to the beach section?