1.21 clientbound/minecraft:set_entity_data error

[mike3132]

• [x] This issue is not solved in a development build I am on version 5.3.0-SNAPSHOT-723 of the protocol lib jar and 5.1.0 of the api

Describe the bug A clear and concise description of what the bug is. When sending a PacketType.Play.Server.ENTITY_METADATA the server kicks all online players and sends them the error below.

To Reproduce Steps to reproduce the behavior: pastebin of the code here > https://pastebin.com/6abPScvd Error log: https://pastebin.com/fFNBYiLA

Expected behavior A clear and concise description of what you expected to happen. It doesn't kick players

Screenshots If applicable, add screenshots to help explain your problem. https://imgur.com/a/glTqs1I

Version Info Provide your ProtocolLib install info with /protocol dump through pastebin. https://pastebin.com/32UUfRmR

Additional context Add any other context about the problem here.