@amyvanwyk11 Does your computer run Windows or macOS? If Windows, please uninstall the EA App with Revo Uninstaller (the free version is fine), and use the Intensive scanning method. Restart your computer before reinstalling the App.
If you have a Mac, please use this method to uninstall the App:
https://bluebellflora.com/2024/04/04/ea-app-recovery-for-mac-reset-ea-app-by-clearing-cache-and-other-files-manually/
For Supernatural, does it appear in the EA App (once it's working again), under Sims 3 > Manage > Manage add-ons? If so, what do you see there? Please also let me know where you bought the pack.