I struggle with the The tier parameter is one of the tiers available on the server. The client will download patches as they become available in that tier. part.
According to What are Livepatch tiers?, the tier options should be Internal, Updates, Stable - but when I try to use updates with my on-prem server, it returns an error. Stable works, but I am not able to figure out how these tiers are defined in my server, or how I can check which are available.
The document could be improved in this area by providing the reader with a hint on how to find out what tiers are available on their server.