It's seems to not be solved because the sever keep crashing in 1.13.1 ... but its a duplicate of MC-131071
i have a the same error message on my 1.13.1 server when i go to the nether, the server crash. And now, when go back to the server, it crash again and again with the same error message.
the crash report :
It's seems to not be solved because the sever keep crashing in 1.13.1 ... but its a duplicate of MC-131071