AWS EFS: unable to mount on amazon linux using amazon-efs-utils

I have created a simple EFS and trying to mount it to my AWS EC2 which is using amazon-linux distribution.

I have been following the very simple instructions given there,

I login to the my EC2, then

$ sudo yum install -y amazon-efs-utils

$ sudo mkdir efs

$ sudo mount -t efs fs-9341z1x0:/ efs
Traceback (most recent call last):
  File "/sbin/mount.efs", line 694, in <module>
    main()
  File "/sbin/mount.efs", line 690, in main
    mount_nfs(dns_name, path, mountpoint, options)
  File "/sbin/mount.efs", line 480, in mount_nfs
    proc = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
  File "/usr/lib64/python2.7/subprocess.py", line 390, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1025, in _execute_child
    raise child_exception

I am unable to debug this issue. I then created my own NFS server on an ubuntu machine and when I tried to mount that on my amazon-linux machine, I get the following error,

$ sudo mount xx.xx.xx.xx:/home/ubuntu/nfsshare efs
mount: /home/ec2-user/efs: bad option; for several filesystems (e.g. nfs, cifs) you might need a /sbin/mount.<type> helper program.

Any help on this?

FYI: This EC2 is built using kubernetes worker node AMI in the ap-south-1 region. I am trying to create PV.