hi,

I use self.history to get 1-min data of 2 years period and make some caculation in research notbook. After tens of Iteration for different equities, kernel will die. If i just get historical data without calculation, kernel will die too or get Exception as follows:
Exception: QuantBook.Main(): System.InvalidOperationException: Failed to retrieve cloud data permissions for user 90365 and organization 4767e9f8438992b6f5dea8ee869cc457
  at QuantConnect.Cloud.Server.CloudDataPermissionManager.Initialize(AlgorithmNodePacket job) in /LeanCloud/CI.Builder/bin/Debug/src/QuantConnect/LeanCloud/Cloud.LeanManagement/CloudDataPermissionManager.cs:line 38
  at QuantConnect.Research.QuantBook..ctor() in /LeanCloud/CI.Builder/bin/Debug/src/QuantConnect/Lean/Research/QuantBook.cs:line 129
  at QuantConnect.Research.QuantBook..ctor() in /LeanCloud/CI.Builder/bin/Debug/src/QuantConnect/Lean/Research/QuantBook.cs:line 195

Is there any limitation to access data?

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