System.NullReferenceException: Object reference not set to an instance of an object.
[2018-09-10 17:24:36.5098] [I] [Program] .NET Core 4.6.00001.0 on Linux 4.4.0-134-generic #160-Ubuntu SMP Wed Aug 15 14:58:00 UTC 2018 [X64]
[2018-09-10 17:24:36.6891] [I] [ShareRecorder] Online
[2018-09-10 17:24:36.6986] [I] [ApiServer] Launching ...
[2018-09-10 17:24:36.9620] [I] [ApiServer] API Online @ 127.0.0.1:4000
[2018-09-10 17:24:36.9663] [I] [ApiServer] Admin API Online @ 127.0.0.1:4001
[2018-09-10 17:24:36.9733] [I] [PayoutManager] Online
[2018-09-10 17:24:36.9733] [I] [StatsRecorder] Online
[2018-09-10 17:24:36.9802] [I] [PayoutManager] Processing payments for pool etc1
[2018-09-10 17:24:37.0536] [I] [etc1] [Pool] Launching ...
[2018-09-10 17:24:37.0766] [I] [etc1] [Ethereum Job Manager] Launching ...
[2018-09-10 17:24:37.1412] [I] [etc1] [Ethereum Job Manager] All daemons online
[2018-09-10 17:24:37.1693] [I] [etc1] [Ethereum Job Manager] All daemons synched with blockchain
[2018-09-10 17:24:37.2465] [E] [etc1] System.NullReferenceException: Object reference not set to an instance of an object.
   at MiningCore.Blockchain.Ethereum.EthereumJobManager.<GetBlockTemplateAsync>d__15.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 183
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumJobManager.<PostStartInitAsync>d__39.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 573
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.JobManagerBase`1.<StartAsync>d__23.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/JobManagerBase.cs:line 210
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumPool.<SetupJobManager>d__8.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumPool.cs:line 278
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Mining.PoolBase.<StartAsync>d__40.MoveNext() in /home/pool/miningcore/src/MiningCore/Mining/PoolBase.cs:line 352 System.NullReferenceException: Object reference not set to an instance of an object.
   at MiningCore.Blockchain.Ethereum.EthereumJobManager.<GetBlockTemplateAsync>d__15.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 183
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumJobManager.<PostStartInitAsync>d__39.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 573
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.JobManagerBase`1.<StartAsync>d__23.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/JobManagerBase.cs:line 210
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumPool.<SetupJobManager>d__8.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumPool.cs:line 278
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Mining.PoolBase.<StartAsync>d__40.MoveNext() in /home/pool/miningcore/src/MiningCore/Mining/PoolBase.cs:line 352    at MiningCore.Blockchain.Ethereum.EthereumJobManager.<GetBlockTemplateAsync>d__15.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 183
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumJobManager.<PostStartInitAsync>d__39.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumJobManager.cs:line 573
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.JobManagerBase`1.<StartAsync>d__23.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/JobManagerBase.cs:line 210
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Blockchain.Ethereum.EthereumPool.<SetupJobManager>d__8.MoveNext() in /home/pool/miningcore/src/MiningCore/Blockchain/Ethereum/EthereumPool.cs:line 278
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MiningCore.Mining.PoolBase.<StartAsync>d__40.MoveNext() in /home/pool/miningcore/src/MiningCore/Mining/PoolBase.cs:line 352
