Error: module `vibe` is in file 'vibe\vibe.d' which cannot be read

[Baby Beaker via Digitalmars-d-learn]

#!/usr/bin/env dub
/+ dub.sdl:
   name "hello_vibed"
   dependency "vibe-d" version="~>0.8.0"
+/
import vibe.vibe;
void main()
{
    listenHTTP("127.0.0.1:8080", (req, res) {
        res.writeBody("Hello Vibe.d: " ~ req.path);
    });

    runApplication();
}


Message error:
Error: module `vibe` is in file 'vibe\vibe.d' which cannot be read

I'm trying to use vibe, but I get this error? I am a Dlang study 
yet. Someone can helpe me step by step get write this Hello 
Vibe.d working in browser? Thank you.