Google OBB Downloader "Download failed because the resources could not be found"

I’m using Google Obb Downloader. On my android device I created path to my .obb file
Android/obb/com.example.stuff/main.3.com.example.stuff.obb.

When I open the game, scene 0 with gameObject that has GooglePlayDownloader and DownloadObbExample scripts attached everything loads just as it should. On top of the button strings

Main = ..,/main.3.com.example.stuff.obb 
Patch=...NOT AVAILABLE

appear - everything seems fine.
But when I press Fetch OBBs button message “Download failed because the resources could not be found” appeares. I checked my bundle version and ID, but everything is right. Anyone knows what could cause the problem and how to get rid of it? Oh and I didn’t download the game from google play, I copied files from my PC straight onto the phone(if it matters of course).

Fetch OBB likely tries to get your obb from Google Play.
If you deployed apk and obb directly to your phone - it should Just Work.

You can probably find some useful info at Unity - Manual: APK expansion files and APK Expansion Files  |  Android Developers.

My solution http://forum.unity3d.com/threads/google-play-obb-downloader.173163/#post-1891095