The
invalid argument (22) message more-or-less happens with
any connectivity issue. It is trying to set the ownership of the transferred file. Unfortunately, rsync is not the world's best at producing meaningful error messages.
Provide us with the actual rsync command that you are trying to use, and tell us a little bit more about that share ... and your permissions to it.
Other possibly useful (external) links:
Remember that NFS is very peculiar with regards to owner-ids. Does this owner-id
(uuid number ...) exist on both servers? Does the share allow you to change it, or does it "squash?"