Mods and cc not showing up in game

If you can't see CC in your game at all - it doesn't show on loading the game, or in CAS/Build Buy mode, then check if the tickbox is staying on in Game Options. If it isn't, please see https://forums.ea.com/discussions/the-sims-4-technical-issues-pc-en/current-issue-anti-virus-blocking-user-folder-screenshotsgallerymods-/11778999

If it's staying on, check that your CC is in the right folder: https://sims4.crinrict.com/eng/2018/07/how-to-find-your-user-folder/  

If CC is in CAS but not on Sims, you likely saved while it was turned off. See https://forums.ea.com/discussions/the-sims-4-mods-and-custom-content-en/i-need-help-fixing-my-save/9211591/replies/9211592 

Hi!! Thank you for the links! 
I noticed that I had all my cc in build but but not in cas. I also cannot put cheats into the cheat bar. Honesty I have no idea what has happened. 

Many of the script mods have now been updated to fit with the new update if it was necessary. One thing I did was look at any script files in my mods folder and check those creators for updates. Time consuming, yes, but deleting the mods that creators had not yet updated fixed the issue for me. I did keep a list though of creators to check in with to see when or if they update, since I did like their mods. 

While it’s disappointing in gameplay to lose some mods for now, I’ve found it’s better to operate with the working ones to keep some in my gameplay.

This way you can also keep all your CC activated in game. 

MikaMooo​ For the cheats in the cheat bar, that's usually caused by outside software. You can get support on that in Tech Support if it's happening when you remove all mods and CC. 

For CAS not showing but Build/Buy is, double check your Mods folder itself. And then try a 50-50 test of your mods to see if one mod is blocking the CAS. Start by pulling out just Build/Buy as a quick first test.

abbyrh0022​ You can use Broken/Updated Mods & CC as a shortcut. I started making this public list back in 2015 when I was doing the same as you are now and decided to share the info broadly. Not all creators are covered here, but it can shorten your list and search time.