Crash Minecraft Windows 10 Edition

I was going to enter my world of minecraft windows 10 edition and when I took charge I left everything black but with the options that you get when you are in bed. I got "Get up" and "Chat". I gave him up and the game closed. Then I reopened it and reentered the world. The same error happened to me but this time I put "Chat" and the chat opened, but when I take it out again I take myself out of the world and the game closes.
I don't want to lose that world and that's why I do this Issue.
I am looking forward to your response.
Thank you.
Regards.