Nginx error in learn theme

I've installed learn theme with developer documentation content, and nginx it's giving me this error in the log:

2015/09/07 20:57:37 [error] 10#0: *17 FastCGI sent in stderr: "Primary script unknown" while reading response header from upstream, client: 10.0.1.202, server: docker.local, request: "GET /api/plugins HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "10.0.1.41:83"

on the page i have got just a *file not found"

what can be the cause of this error?

fixed by adapting the nginx.conf file inside the grav package :-)

Glad you solved!