When performing an FLR on a Windows machine's archive in vRanger, a volume may mount-up at the mount phase operation, then show up as a volume within the FLR screen.
However, when the vRanger user attempts to expand/browse the volume, it appears not to contain any folders or files. No error message is thrown.
The volume may be restricted via NTFS permissions. When an FLR is attempted, the currently logged-in account on the vRanger machine is used to mount the metadata of the folders/files in the archive to allow them to be browsed, selected, and extracted.
If this user account does not have access (via an explicit DENY permission or exclusion on the "live" machine from which the archive was taken) to browse the files, the metadata cannot be mounted, and the "blank" volume appears (also, if the DENY/exculsion is not volume-wide, only some files may not be visible).
Domain Permissions to a particular folder will not change for the FLR purposes.
Correct NTFS permissioning on the AD groups/users accessing the "live" machine where the archive originated to allow the logged-in user on the vRanger machine READ/WRITE access. Then, re-try the File Level Restore (FLR).
If the live server is not available the following steps can be used:
Log onto to vRanger using the credentials with permissions on the files and run the restore.
There are other possible causes/solutions to this issue.