App shut down when I open my last world

Hello Minecraft people,

I use Minecraft app on my 6th generation İPad with 15.3.1 iOS. When I try to open my last world dated 05/02/22, the app shuts down. I've worked really hard on that world. What should I do to open it without a data lost? Could you help me please?

My user name is Battlestar0012. I am looking forward your reply.

Best Regards,

Ege