Permission errors on Ubuntu 18.04

#1

Hi, I have installed Sickrage and Transmission on my Ubuntu (Bionic Beaver) server but I am getting the below error. I used the HTPC guide found here https://www.htpcguides.com/install-sickrage-ubuntu-14-04/

2019-05-16 10:41:41 POSTPROCESSORQUEUE-AUTO::Failed creating /mnt/qnap/Multimedia/TV_Shows/Blacklist/Season 04/ : OSError(13, ‘Permission denied’)

What am I missing?