Re: Sims 4: Sim won't complete actions.
@babybeetlejuice As a test, try playing a new save in a clean game folder. Move your entire Sims 4 out of Documents\Electronic Arts and onto your desktop, then launch the game to create a new folder. Don't add anything to it yet, just play for a while and see if the same problem reappears. This will distinguish between a system issue and a problem with your existing Sims 4 folder, or rather, one or more files inside it.
If the game runs normally in the clean folder, then the first suspect would be a mod. I know you've tested with only the "working" ones, but some mods aren't so broken as to cause symptoms right away. Occasionally you can have one that only creates a problem under specific circumstances, and it can be difficult to figure out unless you test the same scenario both with and without the mod present. But if one or more mods are the issue, the only solution will be not using them.
If you still see the issue in a clean folder, please run a dxdiag and attach it to a post.
https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/