Sims 3 Store Content won't install correctly or stay installed

@Annarata   I think downloads from The Sims Store are launcher specific; and different TS3 installment have different launchers. Trying to install an item downloaded through one kind of installment specific launcher; into the launcher for another, is one reason for that error message, as well the 'brown box' icons for the items.
It seems to be a generic message though, and can also mean your game is not updated for instance.

Did you download directly from the store, for instance from your Purchase history; and did you open the launcher before you pressed "Download"?
Or did you copy your previously made backups of store items and pasted them into the Sims 3 folder? If the latter: were the previously downloaded items from a different install version?
Do you now have different installed versions of TS3 on your computer(s);  through discs, Steam, Origin?

@Annarata  Thank you for clarifying. It's normal for Origin to want to update. I suggest you try to download and install one store item in a new sims 3 folder to see if that will work:

Rename The Sims 3 folder in Documents>Electronic Arts to: The Sims 3old; and launch the game, a new folder will be created. Download just one item from the store to it, and let me know if it works.

Thank you I will try this and see if it works first I need to try and get it back to the last lot working since the origin updated. I will let you know how it goes 

@Annarata   The reason why it is good to try in a new fresh Sims 3 folder is that if it then works, then there might be a problem with your old Sims 3 folder, and we'll know that. And if it doesn't work, then the problem is likely with Origin.

And the reason why it is good to try to download just one store item is that sometimes the installs doesn't work because there were too many items installed at once; and your error message did show a long list of unsuccessful installs, so maybe you tried to do just that.

The best way to download and install store items depends on how much you have, but the recommendation is to start with large items, like worlds, and only one by one. Then move on to venues, one by one; and last smaller items, not too many at a time. If you 'own the store', there is a complicated guide made by a player at the official forum here:

https://forums.thesims.com/en_US/discussion/866577/how-to-install-store-items

But I suggest you try what I said first, to try to locate where the issue is.

@Annarata  Thank you. Here are some more things to try:

Disable OneDrive if you haven't already.
https://support.office.com/en-us/article/turn-off-disable-or-uninstall-onedrive-f32a17ce-3336-40fe-9c38-6efb09f944b0

EDIT: Create yet another new Sims 3 folder, install just one item to it. Check to see if it is installed in game, or in Main Menu if it is a world.

Restart your computer. Check to see if the item is installed or gone.

If it is gone: create yet another folder, install one store item to it.

Toggle the button Run without custom content found in the launcher>Installed Content tab and clearing Internet Explorer's cache, cookies and history: check it, clear IE cache; Go to Main Menu in game; exit game; uncheck the button, then clear IE cache again. Make sure you uncheck preserve favourite website data when clearing IE's cache.
https://kb.wisc.edu/page.php?id=15141

Restart the computer and see if the item is installed/gone.

If it is gone reset IE and see if that makes a difference.
https://www.techsupportall.com/how-to-reset-internet-explorer/

Sorry about the edits.

(Thanks to @puzzlezaddict )