New Green Tree Frog wont eat.

[Bolisnide]

oh ok, that's an american green treefrog, Hyla cinerea. if I'm not mistaken, their care is very similar to the Grey treefrog, so this caresheet may work for you: Frog Forum - Gray Tree Frog Care and Breeding
You'll want to treat the water, even bottled water.
I forgot to mention about the multi-vitamin, it's important because the frog also needs vit a. There's a disease called 'sticky tongue' disease that makes it hard for them to eat, and it's like their tongue is stuck in their mouth. So yes, it's important .
EDIT: wait, someone else better confirm, I looked at the photo again and now I'm not 100% positive its a Hyla cinerea???