Don’t worry, but until you don’t read some post or partecipate to discussions those functionality are blocked (spam control).
Regarding your problem, honestly i don’t see anything wrong on the setup.
Found a similar topic, probably you can try to delete this datasets on the destination pool ssd-raid-backup/ssd-raid/timemachine-macmini/macmini and try again.
(And probably you want check full file system replication)