• This issue is not solved in a development build

Describe the bug
When a player joins, error message says cannot inject the player.

To Reproduce
Steps to reproduce the behavior:

1. Join the server.
2. See error

Expected behavior
To pass the JoinEvent and QuitEvent.

Screenshots
https://gyazo.com/4badff41e0739045dfeee37a9dc961e2
https://gyazo.com/8db01247c7cd0c4498bafd8a4ea7ed71
https://gyazo.com/3888d1f1c769d70947fdcde231466285
https://gyazo.com/3308c6add82629aea43de1fe7a41a91b
https://gyazo.com/17d8d03cc75f00a4726800fcd5b891a7
https://gyazo.com/a518ecae8d65f5a61cf97dd2a3a2c25d

Version Info
https://gyazo.com/5cb944df219a6264be9041398394824b
https://gyazo.com/960d148a32fe6128528f7f142c13ff13

Additional context
Issue happens when players join and quit. I have tried all versions that are supposed to support 1.7.10 but I keep receiving the same error.