TimeMachine restore "No volumes found in backup"

Hi,

I am trying to restore from a TimeMachine backup. I can connect to the NAS from the mac boot process, and see the user's MacBook listed that I want to restore from.

But under that, it says "No volumes found in backup"

I checked on the NAS disk itself, and can see there is a recent TimeMachine backup.

I just updated firmwared to 6.10.5 but that did not help.

Note that I can see volumes for other users' machines on the TimeMachine NAS disk, so there appears to be something wrong with the backup for the particulare user/machine I am interested in. Apple are not willing to provide any support for 3rd party NAS Timemachine usage.

Any ideas what else I can check? Thanks in advance.