15th anniversary Steve's computer Alpha glitch

I made a world for the 15th anniversary downloadable world and I was going through finding the stickers but when I tried to play the mini game that takes place in Steve's computer, the world glitched and shut me out and then when I loaded back in, everything was missing textures and broken and completely unplayable because there were no more mini games everything was just made out of dirt. So I made a new world, I went through every single thing I could find I found all the stickers except for the ones in the alpha section and the exact same thing happened, the game crashed and shut on me when I was in that game