[CC and Milestones, error code 110-578ef827] Stuck On Loading Screen Sims 4

After clicking on my save game it brings me into the manage world menu, other households will load, but my main household won't. It just stays on the plumbot load page indefinitely. I played with mods previously but tested without any mods, I've repaired the game (even reinstalled it), I've tried loading the previous save file, and tried uploading the family to the gallery and starting a new game with them, but none of these have worked.

I've been playing this household for nearly two years now and would be heartbroken to lose it, any fixes would be appreciated :)