Failed :cannot mount nfs server exported path during add file storage volume

Dear Expert,

We are installing micro-focus opsbridge container in our environment. for using bvd application
Installed CDF successfully We have separate NFS server and directory are created and make entry in /etc/exports

Now getting issue in management portal during adding a File storage its shown failed to validate volume.
In the volume_check.log below message
Failed: cannot mount 10.x.x.x:PATH.

I am new in this forum please guide me.