Minecraft World Launcher Problem

So A few days ago I created a minecraft world in Minecraft Beta and I played in the world for about 3 hours and then I saved and quit, and the next day when I woke up ready to play I clicked on the world and the world just kept loading never changing from "Loading Resource Packs" and "Generating World" I reset my xbox and minecraft and it just kept not working. Plz help Because I need to play that world again.

 

 

 

p.s: i was playing in beta 1.15.0.54