Apparently, 1.7.x doesn't work with PacketEvents, I recommend use legacy versions for the moment. Probably some checks go to work with Bukkit Events if packetevents isn't in the server, like legacy versions (but with ProtocolLib).
Reset your checks.yml and language.yml if you want this changes, if you don't reset, this still go works correctly with your actual config (if is 1.2.1).
Report any error or give your suggestion in the discord server support.
The anticheat has been a little recoded, a lot of checks still missing but has another news, I go to upload versions and give support for this version. Version "legacy" (only for users with the version 1.2.0) still can receive "basic" support. (Also, if you want download any bug-fix for legacy version, join to the discord server)
This version has little new features, reset all of your configs for this update, hooks are missing, I don't think this can false flags with certain plugins for the moment. Please, report any error or give your suggestion in the discord server support.
(For the moment, nothing changed in Phase check, the recode is under development)
You found a error? Join to the Discord server clicking here.
You found a error? Join to the Discord server clicking here.

FoxAddition is an anti-cheat plugin designed to block certain types of hacks, possible to use it with another anti-cheat plugin making it an additional anti-cheat for your server.