I have recently updated my world to 1.13. It was generated in 1.12.2. I have played approximately 15 hours without issue in 1.13. I was going about my business, just digging clay out of the bottom of the river when all of the sudden I crashed. Upon attempting to reload the world I crashed again. I rebooted my PC, and after another failed launch I looked at the error message and the crash log. My friends and I were unable to come up with a solution ourselves so I am posting here.
The game crashed whilst exception generating new chunk
java.util.concurrent.ExecutionException: h: Loading NBT data