Rancher-NFS doesn't work: Internal Server error 500

I have a three node Rancher cluster and an NFS server:

Tested NFS from another client and it works:

$ sudo mount X.X.X.83:/var/nfs/general /mnt/nfs
$ ls /mnt/nfs
$ df -h
Filesystem                     Size  Used Avail Use% Mounted on
...
X.X.X.83:/var/nfs/general   46G  2.6G   41G   6% /mnt/nfs
$ ls /mnt/nfs
fromserver 

Configured the Rancher-NFS driver:

Configured a service:

But got error related to NFS: Internal Server error 500

Any hint?

What does your /etc/export on nfs-server looks like? @AJ_NOURI

Thanks for your reply @StrongMonkey.

$ cat /etc/export 
/var/nfs/general      *(rw,sync)

I have tested it from another client and it works.

$ sudo mount X.X.X.83:/var/nfs/general /mnt/nfs
$ ls /mnt/nfs
$ df -h
Filesystem                     Size  Used Avail Use% Mounted on
...
X.X.X.83:/var/nfs/general   46G  2.6G   41G   6% /mnt/nfs
$ ls /mnt/nfs
fromserver

@AJ_NOURI Also in nfs-driver container, can you grab the logs where it failed to mount? there might be some detail error logs.