Well, maybe also the tutorial specification page was not clear enough.
This means that, at creation time, the topic exists, but can only be seen by moderators and administrators, until it has been approved. Before approval, the topic is still in the "new topic" list (where it should be, because it's a new topic) but you cannot see it because you don't have permissions on this topic.
4. Keep in mind that your Tutorial WILL NOT BE VISIBLE till it is read and approved by one of our moderators. Till then, be patient and try to avoid double posting.
So, the error message is somehow confusing, the error message should not say "sorr, error", it should say "sorry, not approved yet".
However, this problem occurs only on "not approved yet" tutorials, so, once you know the trick you are not trapped any more.
By the way, that's a way of knowing if your approval is still pending : bookmark this link, and as soon as your tutorial will be approved, it will replace the error message.