did you talk to all 5? i waited till i got the rest of them before giving the dish to the last sister. only thing you can do is reload an old save.

 

Warning: Spoilers inside!

is that the hidden shrine where you have to wait til noon? where the shadow forms a heart?

 

Try just doing the shrine's requirements anyway.
If you use a Korok Leaf and blow into the correct holes at the shrine's platform, it'll unlock it. I forgot the order, but you should be able to find it online.

 

Try this.
4-5-3-1-2
(I think)

 

Oh XD I suppose that part of the quest was a bit more difficult to complete as one Rito does hide in an out of the way spot.

I was lucky to find he when I climbed up out of curiosity and remembered to talk to her when the quest started.

 

That's the first place I thought to look back when I first started the quest. Is up on that rock face. However, I just figured the one that was on the little ledge was the last sister so I gave up my search. I'm kind of annoyed becuse I spent far too long trying to figure this out and now I knew the tool I needed to solve the puzzle which I wouldn't have known if I hadn't looked all this up. I like to figure that stuff out on my own. Oh well, at least I got the shrine!

 

i just did this quest

Warning: Spoilers inside!

talk a all 5 of them and you must make the food dish that the one is asking for (the one of them that is by the cooking pot)
after the all 5 go to the Warbler's Nest
talk to of of them at nest
see the or Leaf
stand on the platform
send wind in the order they song in (look the the pillars each has a number they are)