Help please

So yesterday I was updating TS4 and after the update, I tried to play but it kept saying "Unable to start Missing game files" I checked my folder and it seemed normal, other than the fact that I had to move my mods to a USB drive to have the game update for storage, but I didn't think much of it till I tried to play again except with the mods, it said the same thing so I went online and tried to see how to fix it but nothing worked, so I finally decided to make this post and hoping I could get some help with this problem (prob will check for a response tomorrow cause I'll be out)