For AVA if you want to play network media files (via Samba / uPNP etc.) by Kodi, you need to do the following settings:
1. Go to "Settings" on Kodi.
2. Go to "Player Settings"
3. Select "Videos" -> "Then untick "Play video with external player".
4. Afterwards it can play properly for the network media files.
We are going to fix this bug asap, we will provide OTA update once the new firmware patch release, please be patient!
Updated on 10-AUG-2017