@Bluebellflora (or anyone who can help me because I'm freaking out)
The exact same thing happened to me today. I went cc shopping and got like 20 new pieces of furniture, I put it into the mods folder and went to launch sims 4 but whenever I clicked on it it would take me to the origin menu, then I clicked on sims 4 from there and it processed for like 5 seconds then took me straight back to the origin menu. I tried updating and repairing (as you suggested) and nothing worked. I even took out all the cc that I had just placed in my mods folder to see if that would work, because the game was working perfectly fine before I had put those mods in. It still didn't work. I'm literally terrified that I might lose everything and all my saves and not be able to get it to work ever again. I don't really understand what I'm supposed to do for re-launching because it seemed to work for some other people but I don't know how to do that and I would literally cry forever if I lost my saves and families. Is there anything to do or a step by step to help me re-launch? If you see this, thank you so much for your time.