Minecraft Updated and a World is Corrupt

My console updated for the patches and now every time I try to open a map that my family and I have spend countless hours on it closes Minecraft . The preview of the map on the list is of a grey sky instead of a blaze spawner where we last were . is there anyway to fix our world and so we can play on it again?  Also this has only happened to the one map and it was only after the patch update.