Object reference not set to an instance of an object.

at (Object )
at HmDrrif50ybLJh5k31v.snljt7cNjD(Object , HmDrrif50ybLJh5k31v )
at MT4APIGD.MainWindow.H6JMy9k8eh()
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()