Firebase Problems. Searched for a few hours but couldn`t find the error

I made the simplest programm you could imagine with firebase but something just won`t work. I made exactly the same program 3 days ago with another databank but i changed some stuff there so i decided to start new. These are the Properties.
These are the Blocks
And this is the databank
I checked all the basics so the databank is in us central-1, i tried unauthenticate before the blocks, i activated the authentication and have no idea what i am doing wrong. i tried

Working OK here with you above blocks?

No sadly i doesnt work and i dont know why

Try like this: