I started a new algorithm with one symbol, AAPL it compiled ok but I am getting the following error on back test. No stacktrace and nothing helpful in the log.

3 | 12:36:48:
Building Project ID: 129206
4 | 12:36:48:
Build Request Successful for Project ID: 129206 CompileID: 2d9edcf83501da47326a92d4fe876712 Lean Version: 2.1.3.5
5 | 12:36:52:
Backtesting Project ID: 129206
6 | 12:36:52:
Successfully sent backtest request for 'Virtual Violet Leopard', (Compile Id: 2d9edcf83501da47326a92d4fe876712)
7 | 12:36:52:
Backtest ID: 3eb116987460b6aa9b71c9b35c4a800a successfully sent to cloud.
8 | 12:36:53:
Launching analysis for 3eb116987460b6aa9b71c9b35c4a800a with LEAN Engine v2.1.3.5
9 | 12:36:53:
Failed to load subscription: AAPL (Open Stacktrace)
10 | 12:36:53:
Algorithm Id:(3eb116987460b6aa9b71c9b35c4a800a) completed in 0.18 seconds at 0k data points per second. Processing total of 0 data points.
11 | 12:36:55:
Your log was successfully created and can be downloaded from: http://data.quantconnect.com/backtests/7828/129206/3eb116987460b6aa9b71c9b35c4a800a-log.txt