Can't use inventory!?

[Cowboysjoe]

For some reason, my players can't use their inventories or move things from/to chests.

 

[Kiri]

Plugin list?

 

[Cowboysjoe]

Spoiler: Plugins

-JoeIPTracker
- StairsParkour
- Announcer
- CommandSpy
-TimePlayed
-VoxelSniper
-WouldYouRather
-ViaVersion
-Tablist
-CoreProtect
-WorldEdit
-ClearLag
-SurvivalGames
-AdvancedBan
-Votifier
-Multiverse-Core
-AdvancedPortals
-SignEdit
-TimeIsMoney
-PermissionsEx
-PureFreeze
-Minefield-Multiarena
-FeatherBoard
-PlayerLogger
-Multiverse-Portals
-Vault
-GAListener
-CubeRunner
-MassiveCore
-MobArena
-PerWorldInventory
-Holograms
-WorldGuard
-RandomTeleport
-PlayerVaults
-LeakParkour
-NoSwear
-Essentials
-Refer
-CommandSigns
-VanishNoPacket
-HeavySpleef
-AdvancedAchievements
-EssentialsChat
-Factions
-FactionsTop
-EssentialsSpawn
-SilkSpawners
+ A few custom plugins but I know those aren't the problem as it just started receantly.

 

[Kiri]

If it just started recently, just go on ftp and list the plugin that was recently modified. You can start from there by removing recently added/modified plugin one by one.