Can't add media to jellyfin library in proxmox

[dulenz]

I have Jellyfin running in privileged Proxmox container 

I mounted Truenas share with media files  in /mnt/media. I have an user jellyfin in truenas with full access to the share and all folders in it.

this is content of the /etc/fstab in the container:

//192.168.10.20/Media /mnt/media cifs username=jellyfin,password=password,iocharset=utf8,vers=2.1,sec=ntlmssp,nosetuids,uid=jellyfin,gid=media,_netdev 0 0


share is successfully mounted:

username@Jellyfin:~$ ls -l /mnt/media
total 0
drwxr-xr-x 2 jellyfin media 0 Nov 20 22:58 'Go Pro Movies'
drwxr-xr-x 2 jellyfin media 0 Nov  9 09:21  Movies
drwxr-xr-x 2 jellyfin media 0 Nov 10 16:59  Music
drwxr-xr-x 2 jellyfin media 0 Nov 20 22:58  Photos
drwxr-xr-x 2 jellyfin media 0 Nov  8 22:13 'Security camera footage'
drwxr-xr-x 2 jellyfin media 0 Nov 20 22:58  Videos

I can browse to each directory and can see all the files there from terminal in proxmox.

However, when I try to add folder Music (or any other) to Jellyfin library nothing happens. I can see all the folders and the files from GUI in Jellyfin but when I click on Ok it just shows swirly circle     like it is doing something for several minutes and then it just stops without adding any media. I tried this with a folder that has few media files just to make sure it is not taking too much time because of the number of files but still the same.

what could be the issue if someone can help me please I would be grateful.