Online/Offline Workspace Registration not working "workspace not registered"/"token not recognized"

[reetp]

Unable to register a new self-hosted workspace

Splattering comments everywhee on old posts without providing any basic info on your own setup is a) making a lot more work for me with no results, and I don’t even work here b) not making you many friends and c) not going to get a fix. One place, one properly documented message. Thanks.