A couple of days ago I built a cabin on my claim, I even built a loom and dreamcatcher in it. Shortly afterwards there was a crash, and I have since then been unable to enter the cabin.
That's a known bug- the game creates the cabin interior, but doesn't save it. The devs might be able to rebuild the interior room for you, but unfortunately anything you had in it is gone.
Give them a PM... they don't always check the forums. 'Course, I can't promise they will help you. They're the Switzerland of devs, they are.
[To put that in better English: The devs are similar to Switzerland. It's a rather colloquial phrasing. It is phrasing that someone on a rocking chair on a front porch might say.]