2 weeks ago
@THEladyhoss I've moved your post to the Sims 3 PC tech section.
That error message is usually due to your Controlled Folder Access settings. This is a feature of Windows 10 that prevents unauthorized apps from writing to certain folders, but sometimes it blocks legitimate access as well. Here's an article on how to change the settings. It's written for Sims 4, but the principle is exactly the same, and it has some helpful screenshots as well.