有人知道這是什麼嗎?

[19:24:22] Pokemon Servers might be offline / unstable. Trying again...
[19:24:24] Error: System.NullReferenceException: 並未將物件參考設定為物件的執行個體。
   於 PoGo.NecroBot.Logic.Tasks.SnipePokemonTask.GetSniperInfoFrom_pokesnipers(ISession session, List`1 pokemonIds) 於 C:UsersciamoSourceReposNecroBotPoGo.NecroBot.LogicTasksSnipePokemonTask.cs: 行 650
   於 PoGo.NecroBot.Logic.Tasks.SnipePokemonTask.<Execute>d__5.MoveNext() 於 C:UsersciamoSourceReposNecroBotPoGo.NecroBot.LogicTasksSnipePokemonTask.cs: 行 277
--- 先前擲回例外狀況之位置中的堆疊追蹤結尾 ---
   於 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   於 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   於 System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   於 PoGo.NecroBot.Logic.Tasks.FarmPokestopsTask.<Execute>d__2.MoveNext() 於 C:UsersciamoSourceReposNecroBotPoGo.NecroBot.LogicTasksFarmPokestopsTask.cs: 行 216
--- 先前擲回例外狀況之位置中的堆疊追蹤結尾 ---
   於 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   於 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   於 PoGo.NecroBot.Logic.State.FarmState.<Execute>d__0.MoveNext() 於 C:UsersciamoSourceReposNecroBotPoGo.NecroBot.LogicStateFarmState.cs: 行 66
--- 先前擲回例外狀況之位置中的堆疊追蹤結尾 ---
   於 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   於 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   於 PoGo.NecroBot.Logic.State.StateMachine.<Start>d__3.MoveNext() 於 C:UsersciamoSourceReposNecroBotPoGo.NecroBot.LogicStateStateMachine.cs: 行 56