Re: Resource.cfg file not regenerating upon relaunch.
@eezie_lorenzo I really don't know why this isn't working, but the next step is to move the entire Sims 4 folder out of Documents > Electronic Arts and let the game generate a new one. If you get an error when trying to move the folder, or it copies instead of moving, let me know. Otherwise, launch the game and see whether there's a new Mods folder with a new Resource.cfg inside.
Moving the Sims 4 folder will also move your saves and other user data to where the game can't find it, but the files will all be intact. So don't worry about your missing saves for now. Just add a few mods to the new Sims 4 folder and see whether they work, and we can go from there.