I've lost all the things

I was playing normal and suddenly the game gave me an error and it closed and when I opened it again, the area where the chests, ovens, enchantment table were ... as it was erased, a hole was made where it was everything but not from creeper. I attach a photo.

Please help me as soon as possible and give me a solution because I have lost absolutely everything and had many diamonds and enchanted things.

P.S. I do not understand very well about affected versions, the one I have is 1.15.2 but it would not let me put that.