System.AggregateException: One or more errors occurred. ---> System.InvalidOperationException: Failed to set the foreground window.
   at Microsoft.VisualStudio.IntegrationTest.Utilities.IntegrationHelper.SetForegroundWindow(IntPtr window) in /_/src/VisualStudio/IntegrationTest/TestUtilities/IntegrationHelper.cs:line 218
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.<>c.<ActivateMainWindow>b__7_0(CancellationToken cancellationToken) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 66
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.<>c__DisplayClass6_0.<<InvokeOnUIThread>b__0>d.MoveNext() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 58
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.Wait(CancellationToken cancellationToken)
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.InvokeOnUIThread(Action`1 action) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 61
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.ActivateMainWindow() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 53
   at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Object[]& outArgs)
   at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.ActivateMainWindow()
   at Microsoft.VisualStudio.IntegrationTest.Utilities.VisualStudioInstance.ActivateMainWindow() in /_/src/VisualStudio/IntegrationTest/TestUtilities/VisualStudioInstance.cs:line 195
   at Roslyn.VisualStudio.IntegrationTests.AbstractIntegrationTest.<InitializeAsync>d__8.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/AbstractIntegrationTest.cs:line 60
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at Roslyn.VisualStudio.IntegrationTests.AbstractEditorTest.<InitializeAsync>d__7.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/AbstractEditorTest.cs:line 46
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()
   at Roslyn.VisualStudio.IntegrationTests.VisualBasic.BasicArgumentProvider.<InitializeAsync>d__3.MoveNext() in /_/src/VisualStudio/IntegrationTest/IntegrationTests/VisualBasic/BasicArgumentProvider.cs:line 27
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
---> (Inner Exception #0) System.InvalidOperationException: Failed to set the foreground window.
   at Microsoft.VisualStudio.IntegrationTest.Utilities.IntegrationHelper.SetForegroundWindow(IntPtr window) in /_/src/VisualStudio/IntegrationTest/TestUtilities/IntegrationHelper.cs:line 218
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.VisualStudio_InProc.<>c.<ActivateMainWindow>b__7_0(CancellationToken cancellationToken) in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/VisualStudio_InProc.cs:line 66
   at Microsoft.VisualStudio.IntegrationTest.Utilities.InProcess.InProcComponent.<>c__DisplayClass6_0.<<InvokeOnUIThread>b__0>d.MoveNext() in /_/src/VisualStudio/IntegrationTest/TestUtilities/InProcess/InProcComponent.cs:line 58<---