Plex cant view files in NextCloud


I’ve just installed QuickBox on a new dedicated server and so far I absolutely love QuickBox.

I am using this server as a backup server and seedbox.

I’ve just finished setting up NextCloud and I now have all of my media backed up there. I then installed Plex on my server too and when I went to “Add” a “library” of files, I navigated to my NextCloud folder and none of my files/folders are showing up when looking in from Plex.

Is this a permissions issue where Plex cant view whats inside my NextCloud folder?

Many thanks!