Error when sim travels, then disappears from world. Also won't save

I have a sim living on the 64x64 lot in chestnut ridge that can't travel anywhere. I click travel, the loading screen comes up as normal, then this error:

The game failed to load. Error Code:

107:77ddlfbb:75ac7e85. It is recommended that you relaunch the game.

Then the sim disappears from the world as if no one owned the lot where he lived. The only way I've been able to get him back is by exiting the game without saving.

Even if I play with that household without traveling, nothing I do saves (doesn't matter if I "save" or "save and exit", it still doesn't work) and even the recovery saves leave me back where I started before saving.

However, other sims in different households are able to travel.