Object reference not set to an instance of an object.

at (Object )
at ubs6n817DmqRO3f8pPM.n1eTBJXLZv(Object , ubs6n817DmqRO3f8pPM )
at MT4APIGD.MainWindow.oPxb9PC9U6()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()