The world keeps generating but not loading

Hi I'm a fan of minecraft and I've been playing the bedrock edition on my nintendo switch. I have dedicated on a world for days and days to be able to find the elytra wings in The End. But the problem is that hours before sending this, I was going to keep searching the endcity through the Islands and after I closed the game, and then somethin' like 15 minutes later I was going to open my world but It keeps loading but still not open.  My World is 60 mb, it's a pretty decent amount of exploration. Hope this error or "bug" gets fixed because I want to continue my adventure in that world.

 

Thanks for reading my comment

By a gamer of nintendo switch