I've submitted this through bug/help feature, but wanted to post this here in case others have the same issue. If you are someone who only has an imagined home because you sold your house in Ur, there is a minor bug when you teleport home using your key ring. The teleport home works fine, but when you try to /leave to get back to Ur, it gives you an error that you must first go /home before you can /leave. Typing the command /home, while in the imagined space, doesn't seem to work to then let you /leave to get back into Ur. For now, you will need to teleport back out - either using a preset teleport, or teleporting to an Ur house of a friend, if you happen to have a key. Note, even if you reload the game, it will still not let you /leave to get back to Ur. You're only option is to teleport back to Ur if you teleport home.
I suspect that once we only have imagined homes vice the option for homes in both Ur and imagined space, that this issue will resolve itself...however, just wanted to post here in case others were running into the same issue.