I need help and am genuinely very, very frustrated.

I need HELP. I am genuinely very, very frustrated with this bug or whatever it is. (I am not super tech-y so my apologies if this sounds dumb. lol)

The Sims 4, Steam through laptop

I bought the High School Years pack the day it came out. So, sometime in late July, I don't remember the exact date. I have not been able to play since. I can NOT play! Every time I load up The Sims 4, everything works just fine until I load up a saved game (ANY saved game). It loads and takes me to the world selection, just like usual. But when I try to go to build somewhere or resume playing as a household, it takes me right back to the world selection and says something along the lines of "error, failed to load, relaunch the game". When I try again, it takes me right back, but this time a blue box (image attached) thing pops up on the screen and some of the text on the screen turns into "~~~~~". No matter how many times I try again this will not work. I've even tried making a new saved game. I can make my household and select the season/world/house, but I can't play or build. This has been going on since I purchased the pack. Very frustrating. I have tried everything. I tried relaunching, didn't work. So then I looked it up and others are having this issue too, so I did everything the comments said to do - and, like for the people needing help, it didn't work for me. NOTHING worked. Deleting mods/cc, uninstalling the game, "repairing" the game, uninstalling Steam, etc etc etc. I have tried EVERYTHING and nothing works. I'd like to play the game, especially since I spent $40 on this new pack and haven't been able to play it yet! This is very frustrating, so I need help from EA.

Image (blue box)