Video not playing from MythTV Back-end KODI 17

I apologise for this question – I am sure there is a simple solution. I normally use KODI 16 as front ends for MythTV using a Raspberry Pi. All my movies etc are stored on the MythTV back-end. I recently purchased a new Android TV box which was not fully compatible with the MythTV plug-in (it needed a newer kernal). As a result I had to install KODI 17 on the new one. The TV part of works correctly, but I am not able to play any videos stored on the MythTV backbend. They will still play normally on the other KODI 16 boxes.

How I tried to view the movies:

Add videos > Brows > Network File System (NFS) > 192.168.1.80 > /mnt/media/videos

and it will not go any further, I am not able to see the directories which contain the files.

What I have done:
Checked that NFS is running correctly.
On the MythTV back-end checked the file and directory permissions and ownerships.
On the Android TV installed the KODI 17 RC3 and tried the latest daily build.

Any suggestions would be appreciated.