@XCoco_LolipopX , thanks for the update! 😇
If you aged her up by Shift-clicking, then I would assume that that means you have the testingcheats true cheat activated. I don't know if aging a Sim this way causes any problems, but some cheats do, so it is something to consider. It is probably best to test cheats on a Sim that isn't that important to you, just in case. I always age up a Sim with cake.
Exiting out of your game and might do the same as travel, but it might not. So if exiting out of your game and reloading doesn't help, then I would try having both Sims travel to another location and then return home. (I would only try moving them as a last resort, unless you were thinking about moving them to another location anyway. 😉 )
True, older saves often have more glitches, so that is a possibility.
Here is a list of steps you can take to test your Mods/CC to see if any of them are incompatible with the current game, and if so, which ones are the culprit. Keep in mind that it might take a few days for the Mods/CC creators to update their products. Also be sure to delete the local thumb cache.package file as it can contain bits of corrupted data even if you were to delete any outdated Mods/CC! 😞
Please do all of the following in order:
1) Move the Mods Folder to your desktop
2) Delete the localthumbcache.package file in the game folder. (This is very important!) 🤨
3) Fix you game in Origin by logging in and go to Library, then right-click on The Sims 4 and choose the "Repair Game" option from the list. Wait until Origin finishes repairing all your packs and not just the base game. If you are on a Mac, it will only fix the base game. Do not add your Mods folder back yet!
4) Now, when you turn on your game again, it will create a new mods folder that will be empty. Check to see if your game is now working without mods/CC.
5) Now you can try adding back items from your Mods folder one at a time checking your game each time to see which item is causing your game to not work properly. If you have a lot of items, you can try the 50/50 Method, testing in batches.
The CC creators will usually update the CC items and Mods after these updates, so when you find out which one is the culprit, you can get the updated version from whoever made that item of CC in the first place. You should try these steps any time you have problems in your game to rule out CC/Mods problems. It is the responsibility of the Mods/CC creators to update their items anytime EA releases a patch/update, and it is the responsibility of the people who use Mods/CC to make sure they are using the most recent version, which was on September 3rd.
Delete any outdated/broken Mods or CC and if you can replace them with new versions that are compatible with the current game version. After you do all this, you can move your Mods folder back to your game! 🙂
Please update us with how it goes! 😇