TimeMachine restore dosen't work

Hello all,

I have a problem with my TimeMachine backup restores.
I’m trying to restore a backup on a new machine but I can’t launch the restore.

I can see the server and connect to it.
I can see my two volumes corresponding to my two machines, but the laptop can’t load the backup.

I’ve done it several times, restarted the laptop, sometimes I see the two volumes, sometimes not.

Do you have any idea how to make it work properly?
Thanks in advance for your help.