Re: Sims 4 unable to save game because of “game loading is in progress”
@Taryn123456 Please move your entire Sims 4 user data folder out of Documents\Electronic Arts and onto your desktop, and let the game create a clean one, which it will do the next time you launch. Then copy your affected save from the old Sims 4 folder to the new one; saves are in the saves folder, unsurprisingly. Don't add anything else to the new folder yet, not even MCCC. Just see whether you can play normally for a bit. Since you're copying and pasting rather than dragging and dropping your save, you can experiment on the new copy while still preserving the original one.
If you still can't save properly, try recovering a backup save, either from the original affected save or from the new one you made. It's best to use the manual method, then copy the save into the new folder.
https://sims4.crinrict.com/eng/2014/09/save-games/#wiederherstellen