Solved Players being kicked when dropping items

Hello,

after last update there is alot of errors:

Code:

[07/28/2016 21:47:18] [Oxide] 21:47 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:47:32] [Oxide] 21:47 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:47:36] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:47:36] Couldn't find prefab "assets/prefabs/building core/floor/floor.stone.prefab"
[07/28/2016 21:47:47] [Oxide] 21:47 [Error] Failed to call hook 'OnPlayerRespawned' on plugin 'Kits v3.1.11' (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:47:49] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:47:49] Couldn't find prefab "assets/prefabs/npc/stag/stag_corpse.prefab"
[07/28/2016 21:48:12] [Oxide] 21:48 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:48:17] Assertion failed: WorldItem:OnItemDirty - dirty item isn't ours!
[07/28/2016 21:48:19] [Oxide] 21:48 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:48:26] [Oxide] 21:48 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:48:30] [Oxide] 21:48 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:48:32] [Oxide] 21:48 [Error] Failed to call hook 'OnPlayerRespawned' on plugin 'Kits v3.1.11' (NullReferenceException: Object reference not set to an instance of an object)
[07/28/2016 21:48:50] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:48:50] Couldn't find prefab "assets/prefabs/building core/foundation.triangle/foundation.triangle.twig.prefab"
[07/28/2016 21:48:57] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:48:57] Couldn't find prefab "assets/prefabs/building core/wall/wall.toptier.prefab"
[07/28/2016 21:49:18] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:49:18] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:49:18] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:49:21] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:49:21] Recursive Serialization is not supported. You can't dereference a PPtr while loading. (Constructors of C# classes may not load objects either. See stacktrace.)
[07/28/2016 21:49:22] [Oxide] 21:49 [Error] Failed to call hook 'IOnBasePlayerAttacked' on plugin 'RustCore v1.0.0' (ArgumentException: The Object you want to instantiate is null.)
[07/28/2016 21:49:22] [Oxide] 21:49 [Error] Exception while calling NextTick callback (NullReferenceException: Object reference not set to an instance of an object)

when any player drop items on floor get kick.