Bug Report: Incompatibility between ProtocolLib and SimpleScore in Minecraft 1.21
Problem Description:

We are experiencing an incompatibility issue between ProtocolLib and the SimpleScore plugin, which may also affect other plugins. When SimpleScore is enabled, players are unable to join the server, causing a lot of confusion among server developers and administrators.

Steps to Reproduce:

Install the ProtocolLib plugin on the server.
Install and enable the SimpleScore plugin.
Attempt to join the server with a Minecraft 1.21 client.
Expected Behavior:

Players should be able to join the server without any issues, with both ProtocolLib and SimpleScore functioning correctly.

Actual Behavior:

When SimpleScore is enabled, players are unable to join the server. The server returns error messages related to ProtocolLib and prevents players from connecting.

This is a problem from simplescore, not protocollib. Either wait for a new update from simplescore developer (From what i see it wont happen because the plugin looks abandoned) or switch to another scoreboard plugin.

This isn't an issue with simplescore I believe.

#3075

Edit: Yes simplecore needs to use new api.