Please read the first post carefully and post in the thread that reflects your issue best. Go in order from top to bottom if you see multiple of the symptoms. The top ones are more specialized as t...
Ideas
For people with 800/801 bug:
Try delete lot by Sims4Studio. Only if this lot is empty - without sims!
It's help for me (on tested save from willfa13 ) and I hope it will helps your game!
Quick tutorial:
https://docs.google.com/document/d/1w0NmeEk7_zpoVLkIZ0NadtkMbWD3SbFr8OxyBnwZZzA/edit?usp=sharing
What if it's a different creator that caused the corruption? How do we find the corrupted lot?
The corruption doesn't seem specific to creators. If a lot is already giving you errors, you only need the name of the lot to find it using the tutorial.