That one usually just means you need to try again at some later point. Sometimes it connects right away. Sometimes it takes some time.
The one about space is less common. Does it say anything else in that one? Unless you added a lot of extra content in your updated project, I think it may also be spurious. Try again later. However, did you notice the site among the Binder federation members where it launches from usually being different than where it launches now?
Among the rocker/binder ones, I was only able to find 4.1.2 just now (from launch button at top here or here) and that launched fine. I couldn’t find a repo with one for 4.2 even though I see the Dockerhub image with the 4.2 tag here last pushed a day ago.