Issue
When loading into a restaurant, I'm booted back to the map with the error message: The game failed to load. Error Code: Error Code: 123:6346675a. It is recommended that you relaunch the game...
Ideas
Would you be willing to share your save with me ?
If so, please zip your saves folder and upload it somewhere like dropbox, googledrive or OneDrive and PM me the link.
I was able to deconstruct the lot and replace it with a spa. The spa is functional and is able to be visited by sims. I don't have a save file from when the restaurant glitch was happening, but I might be able to recreate what happened on a new game file. I'll PM you once I'm successful with recreating the events that lead to the error code.