Failed to update embedded paths in virtual machine file

When running a test of recovery plan (NetApp NFS storage), the following warning appears in the history:

Failed to update embedded paths in virtual machine file '/vmfs/volumes/deec6d19-efb6a266/.snapshot/vf_recoverydatacentre_company_5(1573890513)_eVDC_RecoveryDataCentre_Company_Loc_Vol16.1741/Protected DC Test VM 4/Protected DC Test VM 4.vmx'. Unable to access file

It's looks as if there's some problem with permissions on the RW snapshot created on Recovery DataCenter NetApp.

However, this only happens for 2 out of 3 of the NFS datastores.  One of them is OK, and I get no warnings.

Any ideas on what may be causing this warning?

Thanks in advance,

IR8