This is the actual error that is spammed to the server once the user tries to log off. The error keeps repeating with a different ID preceding the sapling many times every second.
So the server keeps running, but no one is able to connect.
This is the error message in the server log after the player has logged off.
This is not the exact same error that is seen while the server is still live after the user has disconnected, but no one can connect. That error did not show up in the log.
This is the actual error that is spammed to the server once the user tries to log off. The error keeps repeating with a different ID preceding the sapling many times every second.
So the server keeps running, but no one is able to connect.