Thank you try deleting the localthumbcache.package file in your Sims 4 folder? Any time you remove a mod from your Mods folder it's a good idea to delete the localthumbcache.package file from your Sims 4 folder to clear your game cache. If there is anyone who knows a possible fix to this solution so that my skin overlays can show up on my sims in-game again that would be amazing.
It's been about 3 days now and I still have not come across another person who has experienced a similar issue. I've tried repairing countless times and still nothing yet. I've tried removing all the downloads I downloaded from that day out of the mods folder and reloading the game and the default skin replacement was still showing on my sims, even though the files had been removed from my game. The weirdest part is that when I go into CAS it says the skin overlays are on the sims and I can see that they're on but as soon as I exit CAS and go back into regular gameplay the skin overlays aren't shown on the sims and its just the default skin displayed.
However when I went into my game after downloading, my skin overlays weren't showing up on my sims and everyone in the household had on the default replacement skin. Hi, I recently tried to download some default skin replacements as well as lip replacements as well.