No problem! I still got the notification for this update. :)

Did you try adding the YouTube icon again? (try deleting a letter from the "icon url" and adding it back, for example) If the list was blocking it, it needs to retry to cache it and unfortunately SSS won't do that on its own.

If this still doesn't help, try creating another YouTube search engine with everything the same. If this still doesn't help, see if disabling uBlock Origin and doing the above again helps. If it does then you might have another list blocking the icon. :)

Cheers!