Game Data Incomplete, grey llamas, red and white sims, broken textures

Hello,

I haven't really had any issues with my Sims 4 game before so I haven't used these message boards very much, but I've had a problem show up that I can't seem to find a solution for. I've checked various other posts with a similar problem but none of those fixes helped.

I updated the game yesterday and when I went to load my save (right before you choose a world to play), a message popped up that said:

Game Data Incomplete

Not all game data could be loaded. The save game references neighbourhoods that have been uninstalled or otherwise are no longer available. If you continue playing, you will encounter missing data and may have unexpected results. If you save the game, there will be no way to recover the missing data. 

What I thought was weird was after updating the game and before starting it, I decided to buy two stuff packs (because 50% off) and installed those. When I was scrolling through all the packs I had, I realized none of them were installed, literally NONE, and I had to go through and re-download every single pack. Once they were all redownloaded, I started the Sims and that's when I saw the error message. After googling for hours trying to fix the problem and I had felt like I exhausted all options, I decided I was just going to go through my save file and save every household and lot I created to my library and then completely start over because I was so fed up. However, when I went into the worlds to start saving lots, I saw all those weird grey llamas. They weren't in every world, only Del Sol Valley, Sulani, and Willow Creek, all the rest (from what I recall) had no llamas. In the worlds with the llamas, all my created lots were gone and only base game lots remained.

I have tried to repair the game in Origin (three times now), restarted my computer (twice), uninstalled and reinstalled Origin, moved folders around in my Sims 4 folder (taking out folders one by one to see which one is the issue), and then finally completely removed my Sims 4 folder and placed it on desktop so it would regenerate upon opening again. When I took out my Sims 4 folder, I opened the Sims, started a new game, made a random sim, and when I went to choose a world the llama thumbnails were still there. I play with mods and cc, but removed the folder while trying to fix this issue.

I'm not really sure what to do next, I was set on just starting a new save file and restarting, but once I saw that the llamas were still there even after the Sims 4 folder regenerated I feel kind of stuck. If you have any ideas on how to fix please respond!

Also sorry if this seems super jumbled and all over the place, I wanted to add as much detail as possible and I'm also typing this at 4:30am LOL.

(edit - changed thread title to cover all related issues with this problem, Bluebellflora)