Help! I don't know what to do!

so i have been playing the sims for a while now with mods and cc and i suddenly started getting Better Exceptions animation errors notifications by the handful, and every two minutes i get a BE scan. I've also been having issues with some sims not showing up in the UI (bottom right, travel selection, relationship screen etc.) or they just become invisible and i cannot interact with them. I've had to resort to saving with MCCC auto save every sim hour so i don't lose everything. with one of my generation saves if i try to open it without my cc folder it just refuses to load so i don't know how to determine what the problem is because it's the only save I've been playing recently.