Game stuck on 'Loading...' screen in Edit Town.

Are you using any mods in your game ?

Can you start a new game for testing purposes to see if you have the same issue ?

I am having a similar issue. Except for me, it’s that I’ll go to place a house or save a copy of a house that I’ve built, and it’ll stick me in a never ending “processing” screen. 

@brandylynn042878  I'm not sure how you're approaching this process, but the fact is that Edit Town (and build/buy, and CAS) demand more resources than regular gameplay.  Whether you're getting close to the game's ~3.7 GB RAM limit or just putting extra stress on an already delicate game engine, it's not surprising that you'd have issues placing or saving lots.  There are ways to manage the issue, though:

• Keep Edit Town sessions short in longer-running saves or overly complicated worlds
• Build in a new save, which will take fewer resources to load and maintain, and then save your work to the library
• Build in stages, saving periodically, so that you can quit to desktop and reload as necessary
• Keep lots relatively simple—don't overload them with a thousand objects that will be hard for the game to render all at once
• In an existing save, quit to desktop and reload immediately before going into Edit Town.  The game's RAM use will be lowest right after the save loads

If you're having an issue with a particular lot, especially one that you downloaded from the exchange, you may have also downloaded some bad custom content.  Or you could be using some cc in your build that's giving your game fits.  Either way, try scrolling through your launcher looking for items that don't belong.  (If the launcher crashes while you're scrolling, that's also a sign that you have bad cc.)