sims 4 saves gone, delivery issue, game not working

idk if this is to do with the new update but one of my save files are gone, my most recent one is replaced with a random family and the text on the startup screen just says WWWWWWWWW a bunch of glitchy W's instead of text.

theres also a 'delivery issue' that keeps popping up in the corner but when i try to fix it it just doesnt work