Last Exception Caught by MCCC

So I was having the same problem, the error popping up. So, I did everything you guys said to do, and while it fixed the problem, it created a bigger problem. Most of my custom content hairs, skins, clothing, and furniture looks like it got deleted, and in the hairs, it only left the broken ones I was gonna fix after I fixed the pop-up. I wanted to asked if you have a suggestion or if i'll just have to replace the items I lost