Please fix!!!!! I play with world from previous version (1.13.1.5) all of them still working but one isn't working. When I play map (name MYC) btw I  downloaded this from other app (Master for Minecraft) when I was at 1.13.1.5 it worked properly but when I one day after I updated it to 1.14.60 (latest version) it doesn't work anymore it just closes by itself!!!! btw I did everything in that map I did roleplays I built two highways now I cant work on them because it just kicks me out  shortly after I updated this it was toolbox for Minecraft that did it (when u open mcpe with the toolbox the game quits by itself without reason) now when u click on the world title "MYC" and normally start with loading screen then boom it takes me back to home screen plz fix it as I did everything on that map

How it happens:

1. Open Minecraft
2. Click "Play"
3. Click on the title "MYC"
4. Wait for the world to generate
5. Quit!!!!