Updated for Minecraft 1.20.

I fixed the null pointer exception that occurs when a mob interacts with something normally within a protected chunk.

Someone asked me to add a new feature to make it easier to protect a large area. This was fairly easy to do, so I did it. Now you can issue /CHUNK PROTECT AUTO . You can then just walk around and protect chunks automagically as you walk. Issue /CHUNK PROTECT OFF to stop protecting chunks by walking around. The existing commands /CHUNK PROTECT and /CHUNK UNPROTECT still exist to let you protect and unprotect individual chunks.