Question Server error and world corrupted

[jsemolik]

Me and my friends were playing on our server and everything was fine but then i logged back on like an hour later and the world was entirely under water, chunks werent loading, the console was flooded with errors, and executing commands didnt work. I tried moving the world to a different server but that didnt fix anything. Ive never gotten this error. Below ive included screenshots of the error and what the world looks like. Is there any ay to save our world?