Okay your Issue is the Game tried to load one specific Chunk that had wrong Data in it, probably because of File corruption. Solutions are as follows:
A: Don’t do anything and just try to load the World again and hope it wont happen a second time.
B: If Option A did not work, you delete said Chunk and hope everything works afterwards. Might need a World Editor, or you just go into your “region” Folder and delete the File that corresponds to the coordinates of that Chunk, which will have some collateral damage, but if you did not build anything close to that Area you should be fine.