This error is occurring when right clicking a chest in creative mode whilst on a server running Axiom Paper.
This error is not present when on Singleplayer.
Server version 1.21
Client Version 1.21.1 (Error also happens in 1.21)
The only mod on the client is Axiom and the required Fabric API
Upon right clicking on a chest to change the direction it is facing, you will be immediately be booted out and this is the error message you will receive.
This has also happened in some circumstances when pasting a blueprint/schematic that have chests.
This issue was not present in the previous version of Axiom (3.1.0) on Modrinth.