Could you take another backup? Try to mount the backup from restore tab by selecting mount. Verify the contents on the ESX server and then try SFR.
Couple of questions:
1. Are you using self-restore or limited restore?
2. Is the source VM same as destination VM?
3. Was the disk you are trying to mount (as part of SFR) formatted with NTFS? Were there more than one partitions on the disk by chance?
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