big problems with protocollib

[noSecPL]

• This issue is not solved in a development build

Describe the bug
on versions below 5.2.0 when player dies or uses effect command it kicks everyone on a server
on version 5.2.0 when a player enters the server, the Invalid Player Data error appears

To Reproduce
Steps to reproduce the behavior:

Below 5.2.0

1. install
2. start a server
3. use /effect command or kill someone

5.2.0

1. install
2. start a server
3. players cant join

Expected behavior
on versions below 5.2.0 not to kick players when using /effect or killing someone
on version 5.2.0, players cant join

Screenshots

Version Info
version 5.2.0 https://mclo.gs/VXRjkLl
version 5.0.0 https://mclo.gs/bcQsyL1