Upgrade parts/ingredients not recognized to upgrade/create something

Hey, so I just had this problem too! I downloaded the Country Kitchen Kit and Holiday Celebration content and couldn't upgrade any objects, even with the correct amount of upgrades. I removed them both, not sure which one caused it but it fix everything. There might be a bug in either of those two free packs!

I wonder if this also has to do with the marketplace bought kits.

Did you get the free kit through the marketplace ? If so, could you try if it works if you disable it ?

Ach5568140​ 

I'm experiencing the same issue. I only started playing The Sims 4 about a ~week ago, with no mods and no DLCs (except for one free item that was available at the time).

I wanted to make Ambrosia for one of my Sims, who unfortunately died from hysteria. -.-

I've completed all the requirements: level 10 Cooking, level 10 Gourmet Cooking, and everything else needed for the recipe. I also have all the ingredients, but the game simply doesn't recognize them. I've tried keeping them in my Sim's inventory, moving them to the fridge, and even clicking the recipe directly from the fridge, but nothing changes. :/

After a lot of testing, I managed to get the Angelfish and the Potion of Youth recognized. Strangely, the Potion of Youth is only detected if I buy it immediately before attempting to cook Ambrosia.

The biggest problem is the Death Flower. I've grown around 12 Death Flower plants, but not a single flower is recognized as a valid ingredient. The only time the Death Flower seemed to be detected was at the very beginning, but I didn't have the Angelfish at this moment.

To make things even stranger, after saving and reloading the game, all the Ambrosia ingredients become greyed out again. The Angelfish and Potion of Youth are no longer recognized either, despite still being in my inventory.

I'm honestly pretty confused. The game has been out for years, so I wasn't expecting to run into a bug like this from the base game. Right now it's really hurting the experience and making me think twice about buying the DLCs or even continuing playing :/

(Played on PC / W11 - No mods - No DLCs )

I'm experiencing similar issues. Parts in my inventory not being recognised and now can't purchase anything on a computer and can't purchase books via a bookshelf. Did you manage to resolve your issue?

• My sim has upgrade parts in their inventory, yet, the sim cannot upgrade items due to them not being recognised by the game, unless these upgrade parts were gotten through the 'scavenge for parts' interaction.
  
  
• I believe ordering online has to do with this bug as well as when I purchase upgrading parts, these are not recognised. 
• I later found that having the bee box and collecting honey, the honey was not recognised by the game. Therefore, I was unable to use the honey for recipes. (items are not recognised in the sims inventory nor if I add them to the fridge inventory). 
• When purchasing books, I can only buy books that are already part of the household. No other books are shown as an option to be purchased, including when pressing the option to view by category when doing the order. 
• I tried to fix the bug by eliminating the cache from the game, but the issue continued after relaunching the game. 
  
  Summary:
  
  1. items appearing in the sims/fridge inventory but not being recognised to enable actions like upgrading items and using items in recipes. 
  
  2.  Items with pruchasing and order through computer/phone: upgrading parts can be purchased but cannot be used and ordering issues with books: only appear to be enabled to buy books already owned by the household. 
  
  3. Bug cannot be eliminated by deleting cache from game and relaunching game 

Platform: Mac
Game: The Sims 4
Pack: Cottage Living
Mods/CC: None

Issue:
Canning recipes are not recognizing ingredients even though the ingredients are present in both the Sim inventory and refrigerator inventory.

Example:
Tomatoes, apples, sugar, and other ingredients are visible in inventory/fridge, but canning recipes remain grayed out and show requirements as missing (0/1). Regular cooking recipes correctly recognize the same ingredients. The issue only affects canning.

Troubleshooting Already Attempted:
• Cleared cache files
• Deleted localthumbcache/package files
• Repaired game through EA App
• Tested in a completely fresh save
• Tested with a brand-new household
• Removed all fridge contents and rebought ingredients
• Tested with ingredients in Sim inventory and fridge inventory
• No mods or CC installed

Additional Notes:
Normal cooking functions correctly and recognizes ingredients. Only Cottage Living canning interactions fail to recognize ingredients.

I have been having the same issue where I cannot use upgrade parts even though my inventory is full of them. In addition, earlier in the game I noticed I cannot purchase upgrade parts or books that I do not already own. I have created a new save, deleted my folder and copied over the saves folder, repaired the save and the game x3 and it still hasn’t been fixed. My saves are just becoming more and more unplayable atp.

I have the same issue and it’s with every creation stations! - flower press,  cauldron, apothecary table, flower arrangement, etc. Even repairs don’t recognize the repair parts that are in the inventory.

I don't know if it's the same bug, but my Sims personal inventory is full of upgrade parts, but I cannot complete the career goals or WfH tasks because the game doesn't recognise that she has all the parts. The options in the "Upgrade" pie are all greyed out. Restarted, tried moving them from her inventory and placing in world, putting back in again. No dice. This game is driving me nuts. 

Same issue in my game, I’ve made multiple saves and files and my sims can’t make potions even with the right ingredients in her inventory or use upgrade parts on anything. 
when I first get the parts/ingredients they work for a couple minutes but then they stop working suddenly.

my sim was able to make one potion with an herb and crystal she had just picked up but when I tried to do it again 20 minutes later she suddenly didn’t have the required ingredients.