The given key was not present in the dictionary.
   at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at ZombieBlocks.BoxicEntity.InSolidBoxCheck(Vector3 pos, Dictionary`2 terrainDict, Dictionary`2 definitionDict) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Physics\BoxicsEntity.cs:line 3564
   at ZombieBlocks.BoxicEntity.CheckGroundedBox(Single value, Dictionary`2 terrainDict, Dictionary`2 definitionDict) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Physics\BoxicsEntity.cs:line 798
   at ZombieBlocks.BoxicEntity.UpdateSpecialStatusesAndVerticalMovement(GameTime gameTime, Dictionary`2 terrainDict, Dictionary`2 definitionDict) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Physics\BoxicsEntity.cs:line 991
   at ZombieBlocks.BoxicEntity.UpdateBoxics(GameTime gameTime, Dictionary`2 terrainDict, Dictionary`2 definitionDict, DroppedManager droppedManager) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Physics\BoxicsEntity.cs:line 816
   at ZombieBlocks.BoxicEntity.UpdateLogic(GameTime gameTime, Boolean isNight, Dictionary`2 terrainDict, Dictionary`2 definitionDict, DroppedManager droppedManager, Boolean runByServer) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Physics\BoxicsEntity.cs:line 466
   at ZombieBlocks.BoxicPlayer.UpdateLogic(GameTime gameTime, Boolean isNight, Dictionary`2 terrainDict, Dictionary`2 definitionDict, DroppedManager droppedManager, Boolean runByServer) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Players\BoxicPlayer.cs:line 615
   at ZombieBlocks.HeadlessServer.UpdateEntitiesRedux_NetworkPlayers(GameTime gameTime) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Networking\DedicatedServer\HeadlessServer.cs:line 2378
   at ZombieBlocks.HeadlessServer.UpdateGameLogic(GameTime gameTime) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Networking\DedicatedServer\HeadlessServer.cs:line 762
   at ZombieBlocks.HeadlessServer.Update(GameTime gameTime) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Networking\DedicatedServer\HeadlessServer.cs:line 743
   at Microsoft.Xna.Framework.Game.Update(GameTime gameTime)
   at Microsoft.Xna.Framework.Game.Tick()
   at Microsoft.Xna.Framework.Game.HostIdle(Object sender, EventArgs e)
   at Microsoft.Xna.Framework.GameHost.OnIdle()
   at Microsoft.Xna.Framework.WindowsGameHost.RunOneFrame()
   at Microsoft.Xna.Framework.WindowsGameHost.ApplicationIdle(Object sender, EventArgs e)
   at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FDoIdle(Int32 grfidlef)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at Microsoft.Xna.Framework.WindowsGameHost.Run()
   at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun)
   at ZombieBlocks.Program.Main(String[] args) in C:\Users\teamt\Documents\Deadburg\Deadburg_PC\ZombieBlocks\ZombieBlocks\Program.cs:line 54

In creative mode with no clip turned on, i tried flying to the clouds.