Unable to edit world any longer

I have been editing a world I created. I was able to publish the world as well without any issues until today.

Today, I added pose gizmo to some couches. When I tried to publish the world, it said it couldn't because the world contained pre-release features. The only thing I added was the was the pose gizmo.

So, I tried deleting the pose gizmo and was still unable to publish the world.

Now, when I try to edit the world again, I get an Unable to Travel error. I tried restoring from a few of today's and yesterday's backups and I get the same error. When I try restoring a backup from Dec 25th, it loads but the world is blank.

I can preview the world just fine and it shows me the latest changes. 

I've tried cloning and I've tried creating a new world and importing to it. Nothing works.

How do I fix this?