In case it helps, I just wanted to add that the world crashed while I was playing on splitscreen multiplayer and I was living in a village at the time. I can't quite remember but I was either just about to talk to a shephard or interact with a loom when this occurred.
From looking at other tickets, I think this issue should be linked to MCPE-45862 too.
Please help minecraft!
I have this exact same issue too with a survival world I've put the most amount of my time into. The issue seemed to start after the new villager loading screen appeared.
I can still make new worlds and get into other worlds but just not this one.
I can also confirm that since updating minecraft to 1.11.4 I can also access my world again 🙂
Thank you for all the work to fix this issue!! Charl