phpBB 3.2 EVE SSO / ESI extension [beta]

Hey,
I downloaded the zip via wget to my server and unzipped it. After this, I moved all files to phpbb root, but there is no folder /ext/snitch/authevesso…

When I check another folder, for example adm/style/, then I find files with evesso in it.

In admin interface there is no option to activate the plugin.

What am I doing wrong?

EDIT: I don’t find the folder /ext/snitch/authevesso/ in the .zip file on my windows pc.
EDIT2: I also tried cloning the latest files, but still no folder and no sign in acp.

Kind regards
eXeler0n