Re: [TROUBLESHOOT] Sims 4 “Object not found”

Hi @Missy668!  This sounds like corruption in your game to me.  Please try the following steps: 1) temporarily remove any mods/CC, 2) clear your cache, 3) repair the game via Origin, 4) start a new save, and 5) try building walls in the new save.  If they work in your new save, you can try loading the old save and seeing if they will now work in that save as well.  If not, that save may be corrupt unfortunately.  You can still save any homes that you've built to your library to load into the new save as well as any sims/families.  If you had any mods/CC, you can also try putting them back, but I recommend doing so one by one, and testing each, to make sure that none of them are the cause of the problem.  Please tag me with @bryonyrae if you continue to experience the problem in build mode.

Edit: moving to the technical forum as this does not appear to be bug related.