Cannot add folder to library

Plex Media Server
2

Plex server is not running as “you”..
It has its own user account.
So, if you can see and access a folder in terminal doesn’t mean that plex can do as well.

https://support.plex.tv/articles/200288596-linux-permissions-guide/

https://forums.plex.tv/t/linux-tips/276247/10