CAS (Create a Sim) problem

I play with CC and mods. Whenever I load into a game and try go into CAS (using MCC) it’s stuck on a loading screen. I have tried starting a new game with CC and Mods enabled and whenever I create 2 Sims (I will be using Sim 1 and Sim 2 as an example) and give them a different name Sim 1 and Sim 2 somehow manage to have the same name whenever I select the other sim out of those two. Same thing happens when I load a sim out of my library. This situation only stops when I completely remove any mods and cc from my game. This problem is also affecting previous saved games prior to update.  For now I will play without CC and mods.