[CRITICAL BUG] Server kicks in certain chunks #30

Add a description: https://pastebin.com/DubJeqFv open this link. Basically, with version 1.21.8 players get kicked in some chunks, and the cause seems to be ItemsAdder block injection. Removing it stops the kicks. The server is 1.21.7, and I’ve noticed that users on 1.21.4, for example, don’t get kicked in the same chunk, but I do on 1.21.8.
I’m attaching the error.
I hope you can fix it as soon as possible.