Expected Result
To be seen in Singleplayer worlds screen
Actual Result
Not present in UI
Steps to Reproduce:
I am not sure how this happened, I'm guessing just world issues with 18w19b. Yesterday it was alright, and today after opening the game, I opened the log and saw this when it tried to get the worlds from the saves folder.
Crash Report can be found below
Please check if that's still an issue for you in 1.13.1.