Disconnect with block error when resetting or removing a scoreboard displayed on sidebar.

[Summary] Multiplayer players are disconnected with a "Block Error" when a scoreboard on the sidebar is reset or removed entirely. [Steps to Reproduce] 1. Set a scoreboard objective to the sidebar. 2. Have a friend join the world. 3. Run a command to reset values or remove the objective entirely (e.g., /scoreboard objectives remove). [Observed Results] The connected friend is kicked immediately with a "Block Error". [Expected Results] The scoreboard should reset or be removed safely without disconnecting anyone. [Workaround] Unset the sidebar display before running the reset or remove command.