Is this it?
System.ArgumentNullException: Value cannot be null.
Parameter name: source
at System.Linq.Enumerable.Where[TSource](IEnumerable`1 source, Func`2 predicate)
at a4e.am(bw4 A_0, bw4 A_1, a0g A_2, wj A_3)
at au.am(bw4 A_0, bw4 A_1, a0g A_2, wj A_3)
at b5k.ahc()
at b39.o(bmq A_0)
at b59.a()
at b59.ny(TimeSpan A_0, TimeSpan A_1)
at b39.g(TimeSpan A_0, TimeSpan A_1)
at bpf.a(TimeSpan A_0, TimeSpan A_1)
at akc.a(aj8 A_0)
at a54.g4(aj8 A_0)
at als.g4(aj8 A_0)
at d7.a(aj8 A_0)
at aav.Update(GameTime gameTime)
at gr.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 bb2.a(String[] A_0)
