Uh. . . . The structure of the latest build is placed in a strange way, which can also cause the starlight to collapse.
But a normal windmill will not cause the game to crash
crash-2021-04-08_09.32.55-client.txt

Uh. . Putting it like this will cause the game to crash

But if it is placed normally like this, it will not cause the game to crash

I made a test map for you to test

test world.zip

(machine translation)

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.