Dropbox-Folder is not created after creating a vault

I just try to switch from Boxcryptor to Cryptomator.
I use a windows 10 PC.

I will use Dropbox as Cloud, creating a new fault (CM store: Dropbox"), but wondering, why I don’t see the created “folder” in dropbox.
It check this YP video Cryptomator Tutorial: Erste Schritte - YouTube,
at 0:55 there the vault folder is created (as I expected and understand).
But why is no folder created on my Dropbox ?

In Explorer I see the “Dropbox” drive, but no folder is created.
Whats went wrong?

Which path do you see in cryptomator app below your vault (left side of the app window)?
And can you confirm that this path is included in dropbox sync?