All CAS CC

@Flamerooie Can you try recovering to an old save when the CC was working properly and see if they sims are then clothed and in their right minds?

How to recover a previous game save:

In-Game Method:
Go to the Main Menu and choose 'Load Game'. Select a saved game, then hover over the small folder icon and click this icon.
This will reveal your most recent saves on that 'Game Save'. Select the 'Recover' button on the version (see time stamp) that you prefer.

Game Files Method:
Or you can do this in the game files by following the directions here:
https://help.ea.com/en-us/help/the-sims/the-sims-4/how-to-restore-a-previous-saved-game-in-the-sims-4/

All my saves have the same problem

You said your CC is working correctly, but the update process (Sims patch) stripped the Sims of the C they were wearing, correct? Or did I misunderstand that part?

If the CC is all working properly (can be added to new Sims, etc.), and it's just been stripped from the Sims who already had the CC items on them before the update process (Sims patch), Then if you are having the same issue in all of your current game saves that's why I recommended trying to return to / recover a previous game save to see if they all are clothed in that game save, and if they are, use/play that game save. 

If the issue is present in all of your game saves, you may want to try this process in each game save you have, to get a game save where they are all dressed in the CC in place as the current save for each affected game save.

If this is useful to you, there are step by step directions on this process with screenshots here:
https://sherigr.com/troubleshooting-sims-4/#recover

I tried and the other saves the cc was stripped too...I cant with this if i dont find a solution quitting the game is near because I have too many sims for this to happen.

@Flamerooie I'm so sorry.

Before doing additional 'stuff', would you be willing to share screenshots of your other saves (the list of recovery saves that shows dates for each option)? Please open Documents > Electronic Arts > The Sims 4 > saves and take a screenshot of the contents of that folder. Make sure the modified dates are showing.

There are a few of other things you could check on and try/do...

1. When you say the "CAS cc is present and functioning right in the game", do you mean that it's enabled in options, and if you put the CC on Sims in CAS now it shows and behaves properly in the live game?
2. With that in mind... since the game automatically disables your Mods/CC with a patch/update, did you go back into options and re-enable Mods/CC – re-tick the box(es) for them – in options?
3. After you tried recovering to your old saves, did you save the game and re-enter to see if the CC was present then?

For future reference, or if it's still relevant here, if you open a save and see the CC is stripped from the Sims, you can exit without saving and address it in the above manners. The missing content on the Sims will not be permanent until you've saved without the CC enabled.

Unfortunately, if your Mods/CC were reenabled after the patch/update, and if you then opened saved each of your old game saves, including your recover options of saves so all of the saves have been permanently saved with the content missing, this would be permanently set.

If all else fails, rather than abandon your game, you may want to try some creative way/s of tackling the issue. You could try things like:

• Make sure your CC is reenabled and updated, then...
• Take your favorite save and delete the households with missing content that you don't want to bother with. Then work your way through your favorite/core households and re-dress them all in one basic outfit in all categories (for efficiency) and remove any other messed up outfits.

I've faced some seriously overwhelming nightmare losses of 'virtual content'. (You don't want to go down that rabbit hole with me! 😓 I work in web design and development, and virtual losses can be absolutely devastating and unrecoverable at times.) I'm obsessed now with keeping external backups. Let's just say I've had situations where I had to dig back in for myself or a client and spend weeks or months rebuilding &/or recovering content. It's a harsh reality of the virtual world.

Here's some screenshots

One more

@Flamerooie Thank you for the helpful screenshots!!

1. First, by looking at your example screenshot of your Saves folder, and considering that we have had an update since then, you could try restoring to the April 13th version of that game save. Please follow the directions below carefully, and then open that game save after the recovery is complete and see if your Sims have their hair, etc. If they don't, then don't save, just exit the game (without saving this recovery). If they do have their hair, etc. then save that recovered game save.
   "Recover a Save" directions: (please click spoiler tag)
   
   Spoiler

   How to recover a previous game save:

   In-Game Method:
   Go to the Main Menu and choose ‘Load Game’. Select a saved game, then hover over the small folder icon and click this icon.
   This will reveal your most recent saves on that ‘Game Save’. Select the ‘Recover’ button on the version (see time stamp) that you prefer.

   1. At the Main Menu, select “Load Game”:
      
   2. From the list of game saves…
      
      Find the Game Save you want and hover over and click its “Recover Save” icon:
      
   3. Now a list of version options for to recover to will pop up.
      Find the save from the list that you want to recover to and click its ‘Recover’ button on the right:
      

   Game Files Method:
   Or you can do this in the game files by following the directions here:
   https://help.ea.com/en/help/the-sims/the-sims-4/how-to-restore-a-previous-saved-game-in-the-sims-4/

2.  If the recovery did not successfully fix your Sims' CC issue, you could check your library to see if your game saved a copy of the household(s) you made there. Unfortunately, the Sim households in the library will only preserve the play & skills they had when the household was saved to the library, plus the only relationships that the library version of the household will have preserved will be the relationships within that saved household, but at lease you'll have them. It's possible to use cheats to restore certain job, relationship, skill, and money progress that you had before, but it'll take time and work to do that. (Some of the cheats are explained here, if you need it: https://sherigr.com/sims-4-cheats/how-to-cheat/)
3. You could reference my previous recommendations about fixing certain households in CAS.

Lastly, for future reference, it's super important to store a backups of your game on your computer or an external drive. I backup my game almost every time I play. I've also learned this lesson the hard way. At the very lease, if you play with Mods/CC, you should always make a backup of the entire 'The Sims 4' folder (or at least the 'Saves' folder) before an update, in case you need it. Directions for backing up your game files in this spoiler tag:

what should I do if i see the April 13th as a file but not in game?

@Flamerooie Please try recovering to that save via the Game Files method I mentioned. 

Go into the saves folder and find Slot_00000002.save.ver4, (which you see in your screenshot below). Rename it to Slot_00000012.save, exactly like that, and load it in-game. Let me know whether the Sims are then wearing their CC. 
(Note: This will show as a new game save when you open your game, and you may need to scroll down a bit to see it, since it has an older date.)

Please make sure you make a backup of your game before doing this, via the directions I shared previously.