@liondreamer27 Did you specifically try running the game in a clean folder? Because often it's not enough to just remove the problematic mods. Specifically, drag the existing TS4 folder out of Documents and onto the desktop and then launch the game again; does it still throw the error? If not, download a fresh copy of MCCC (make sure it's compatible with your version of the game, especially now that a new patch has been released), and then try again. If this works, make a copy of this clean folder for safekeeping, and then you can start adding your other mods in batches to test them out.
If the freshly downloaded version of MCCC generates more error messages, I'd highly suspect that it wasn't compatible with your patch level. Has the game been properly updated on this computer? I don't know how reliable TS4 updates are, but if a patch was improperly installed, that could account for the incompatibility of the game and MCCC. I'm not the expert on this sort of thing, but if repairing the game through Origin didn't help, this would be the point where I'd contemplate a complete uninstall and reinstall of TS4.
If a completely clean folder throws errors before you even put anything in it, I would wonder if the installation itself was broken. Again, if repairing the game didn't work, that would be a reason to completely uninstall and reinstall the game.
If you do end up cleaning house, you might as well uninstall and reinstall Origin as well.
https://help.ea.com/en-us/help/origin/origin/manually-uninstalling-origin/
By the way, it's probably a good idea to generate a new clean folder whenever you're trying another troubleshooting step. That way, you're not keeping the possibly borked results of a different process.
One last thing that occurred to me: Be sure when you download something, your computer is really using a fresh download and not just reaching into the downloads folder for an existing file. You can empty the downloads folder each time you try something, just to make sure.