Youth potion isn’t working

I'm playing the Sims 4 on May 26th, 2019, and all you have to do to change your Sim's age to any stage of life is to do the following:

Load your household.

Next, open the cheat window (Shift-Control-C) and type in "testingcheats on" . This will enable the cheats.

After that, enter the following cheat "cas.fulleditmode on" . Most YT videos and websites will tell you that now you just have to click on your sim, then click the now avaliable option to edit your sim. THIS WILL NOT WORK ANYMORE. There is a new way to edit your sim, and it's a little more complicated, but not impossible.

Now, go to manage worlds. Click on the household that your sim lives in. There is a button next to the play button with two people and a pencil. Click on that.

A window with the sim residents will pop up. On the bottom right of that window, there is a button with a pencil. Click on that.

Now you are in Create a Sim mode. You can see options that let you change your Sim's age, their voice, and more. Without the cheat we did earlier, changing the age will not be avaliable.

That is how I change my Sim's age, and once you know the steps, it's pretty easy to do.

Happy Simming yall.

                        Nutaroo22