Couldn't import episode, access to path is denied. chmod 777 doesn't fix it. What gives?

I have a weird issue with episode 11 of The 100 (other series work fine).

I downloads in SABnzbd fine, it is saved on the disk with the same permissions as any other downloaded series.

But NzbDrone hangs on it:

Original permissions are 664 for files and 775 for folders. Changing it for 777 doesn’t fix it. Parent folder in .tmp/ has the same permissions. Any other downloaded series processes fine. What am I missing?

The is the full error:

Check the permissions at the destination as well, the error drone gets doesn’t indicate which end (source or destination) the error is at, but given other series process fine I would guess its thee destination.

Yes it was an NFS permission error indeed. I set all_squash on my export my the underlying dir was owned by root:root. I changed it to nobody:nogroup and it works now. Thanks