Missing person when travelling

@Jessmaadge  You can still try to travel, if you want.  Just don't save if there's a problem.  And make sure you've used "save as" to make a backup copy of the save, in case something goes wrong later.  That way, there's no risk—worst case scenario, you're in the same place you are right now.

To help with the travel transition, you'll want to decrease the stress on the game engine as much as possible.  Here's how:

• Empty your sims' inventories as much as possible.  A few items is fine; a hundred is not.
• Use "save as" to rename the save, then quit (without saving) immediately before you want to travel.
• Load the game just to the Main Menu.  Turn off memories, the in-game shopping experience, and the hidden object interactive loading screens.
• Lower all the graphics settings to the minimum.  (You can revert to your normal settings after the travel transition.)  Now quit the game again, without loading a save.
• Delete the five cache files in your game folder in Documents: CASPartCache, compositorCache, scriptCache, simCompositorCache, and socialCache.
• Empty out everything in FeaturedItems as well.
• If you play through Origin, sign in and then put Origin in offline mode.  Now disconnect your computer from the internet—turn off wifi and/or pull the ethernet cord.
• Now launch your game, load the save, and send your sims to the future right away, as soon as the game clock starts moving forward.

If this doesn't work, then you can reload and try again.  But without mods, there's always some risk of the travel transition failing.  How much of a risk will depend on a lot of factors and isn't always easy to predict.  Still, as long as you make backup copies of your saves, there's no harm in trying.