Here are some troubleshooting tips to try:
1. Move the mods folder to desktop (for testing purposes) - This is to fully make sure it's not outdated mods/cc.
How to Fix Problems with Mods/CC
http://www.carls-sims-4-guide.com/forum/index.php?topic=25031.msg426156#msg426156Custom content can become outdated with most new game patches. If the game works when the Mods folder is removed, then one or more of the mods and/or custom content has become outdated and will need to be removed or replaced. EA/Maxis aren't responsible for broken mods/cc. It's up to the creators to fix.
2. Repair Game:
In Origin > Games Library, right-click on Sims 4 and select Repair. - It does not make any changes to the saved game files. Meaning that your saved games are safe, they won't be deleted. If you'd like you can copy the Sims 4 folder to the desktop or a USB key.
3. Delete Game Cache Files (What and How-To)
http://www.carls-sims-4-guide.com/forum/index.php?topic=29288.msg401662#msg4016624. Try a Sims 4 Factory Reset - (What & Howto)
http://www.carls-sims-4-guide.com/forum/index.php?topic=29292.msg401669#msg401669** Do note that this doesn't really have anything to do with the Toddler pack itself. It has happend with other objects in the game.
