can you provide more of the log? such as when it is happening such as on load, after someone joins? anyone else getting these errors? everything seems fine on my server.
2016-05-27T09:50:36 95.774 ERR [MODS] Error while executing PlayerSpawning on mod "Server Tools"
2016-05-27T09:50:36 95.774 EXC Method not found: 'NetPackageGameMessage..ctor'.
MissingMethodException: Method not found: 'NetPackageGameMessage..ctor'.
at ServerTools.API.PlayerSpawning (.ClientInfo _cInfo, Int32 _chunkViewDim, .PlayerProfile _playerProfile) [0x00000] in <filename unknown>:0
at ModManager.PlayerSpawning (.ClientInfo _cInfo, Int32 _chunkViewDim, .PlayerProfile _playerProfile) [0x00000] in <filename unknown>:0
UnityEngine.DebugLogHandler:Internal_LogException(Exception, Object)
UnityEngine.DebugLogHandler:LogException(Exception, Object)
UnityEngine.Logger:LogException(Exception, Object)
UnityEngine.Debug:LogException(Exception)
Logger:masterLogException(Exception)
Logger:Exception(Exception)
Log:Exception(Exception)
ModManager

layerSpawning(ClientInfo, Int32, PlayerProfile)
GameManager:RequestToSpawnPlayer(ClientInfo, Int32, PlayerProfile)
NetPackageRequestToSpawnPlayer

rocessPackage(World, INetConnectionCallbacks)
ConnectionManager:IS(INetConnection, NetPackageDirection)
ConnectionManager:Update()
(Filename: Line: -1)
I'm using also latest allocfix mod
This is the error at login of player...
Disabled all function and keept only /gimme function... no error log but command didn't works... simply /gimme appear in chat without effect.