In the Victorian House there is a missing painting of the Tea Party. In order to move in in Ravenlok you'll need to find this missing painting and put it back in it place. Here is how to do it.
After defeating Tweedledee and Tweedledum head backstage in the Theatre, you'll find the painting that you need towards the back in a corner, just before the elevator. Take the painting from the wall and then fast travel with the mirror to get back to the Victorian House.
Find the location on the wall where there is a missing painting and you should be prompted to place the Tea Party painting in the space on the wall.
Once done you'll unlock a new area that you can travel to by touching the painting.