Can't see inside my house.. Sims 4

This happened to me too. I tried to visit the house as a different household and it said to move in a household from the gallery. My theory is that the game hasn't completely registered that your household lives in that house.

I moved the household to a vacant lot (would probably work if it was a lot with a build on it if you have no vacant lots in your worlds). Make sure you sell the furniture with the lot so that when you move back, your hard decorating work is still there. Move the household back to the original lot and it should work.