Trying to mount a shared folder in ubuntu

I'm having problems trying to get my NAS to work on my Plex server.

I'm trying to mount the shared folder in the server but it gives me the error

mount.nfs: Operation not permitted

I think i'm doing everything OK. The commands I ran were

sudo mount -t nfs 192.168.X.X:/volume1/shared /root/Tuga

I think its something to do with permissions and user permissions but I do not know how to give permissions in my Synology NAS to my server user.