Hello.
It may help if you delete your cache files http://sims4.crinrict.com/en/2014/09/delete-cache-files/
Also it may help if you repair the game. To repair the game, right click the sims 4 picture in Origin and click repair.
Check that the houses in the other worlds are all Residential, that none lost their Residential status.
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I had to uninstall Orgin and reinstall. Also had to move my sims from the house to another house. the house was corrupted. But I lost my in game gallery.
Comments
It may help if you delete your cache files
http://sims4.crinrict.com/en/2014/09/delete-cache-files/
Also it may help if you repair the game. To repair the game, right click the sims 4 picture in Origin and click repair.
http://forums.thesims.com/en_US/discussion/817478/hello-come-and-introduce-yourself
http://tinyurl.com/OneRoomOneWeek
http://tinyurl.com/rosemow
My Showcase thread https://forums.thesims.com/en_US/discussion/948861/rosemow-s-rooms-showcase
But I lost my in game gallery.