I got the error below following the steps Develop with .NET Core on Kubernetes with Azure Dev Spaces.

Starting warmup for project 'Webfrontend'. Using dev space 'default' with target 'myapp-hello' Release "azds-1d5814-default-webfrontend" does not exist. Installing it now. NAME:
azds-1d5814-default-webfrontend LAST DEPLOYED: Wed Jun 26 15:52:57 2019 NAMESPACE: default STATUS: DEPLOYED RESOURCES: NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE ==> v1/Service webfrontend ClusterIP 10.0.156.89 80/TCP 1s ==> v1beta1/Ingress NAME HOSTS ADDRESS PORTS AGE webfrontend default.webfrontend.wqlm7l5jbj.cus.azds.io 52.173.150.205 80 1s NOTES: NAME READY UP-TO-DATE AVAILABLE AGE ==> v1beta2/Deployment webfrontend 0/1 0 0 1s http://default.webfrontend.wqlm7l5jbj.cus.azds.io/ 1. Get the application URL by running these commands: Building container image... Sending build context to Docker daemon 3.927MB Step 1/13 : FROM mcr.microsoft.com/dotnet/core/sdk:2.2 ---> 155911c343f3 Step 2/13 : ARG BUILD_CONFIGURATION=Debug ---> Using cache ---> 0a860927aa11 Step 3/13 : ENV ASPNETCORE_ENVIRONMENT=Development ---> Using cache ---> 9aff467dfcc3 Step 4/13 : ENV DOTNET_USE_POLLING_FILE_WATCHER=true ---> Using cache ---> 4eec944c4cdb Step 5/13 : EXPOSE 80 ---> Using cache ---> 051a7179cc8d Step 6/13 : WORKDIR /src ---> c265c50b4cb2 ---> Using cache Step 7/13 : COPY ["Webfrontend/Webfrontend.csproj", "Webfrontend/"] ---> Using cache ---> 29e207ff4a3d Step 8/13 : RUN dotnet restore "Webfrontend/Webfrontend.csproj" ---> 114d8778f570 Step 9/13 : COPY . . ---> Using cache ---> Using cache ---> 45bccf0ad047 Step 10/13 : WORKDIR "/src/Webfrontend" ---> Using cache ---> 7ef376f04ab7 Step 13/13 : ENTRYPOINT ["/bin/bash", "/entrypoint.sh"] ---> Using cache ---> acf4addbf8a8 Successfully built acf4addbf8a8 ---> e173184b7977 Successfully tagged webfrontend:devspaces-x016b947d6bdae4f7 ---> Using cache ---> Using cache ---> 0b2cafae008c Step 11/13 : RUN dotnet build --no-restore "Webfrontend.csproj" -c $BUILD_CONFIGURATION Step 12/13 : RUN echo "exec dotnet run --no-build --no-launch-profile -c $BUILD_CONFIGURATION --" > /entrypoint.sh Built container image in 1s Waiting for container... 5s

Service 'webfrontend' port 'http' is available at http://default.webfrontend.wqlm7l5jbj.cus.azds.io/ Service 'webfrontend' port 80 (http) is available via port forwarding at http://localhost:28228 An error occurred during warmup for project 'Webfrontend': System.InvalidOperationException: Container cannot be reached. at Microsoft.Azure.DevSpaces.Client.Connection.ContainerConnector.d__34.MoveNext() --- 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 Microsoft.Azure.DevSpaces.Client.Connection.ContainerConnector.d__26.MoveNext() --- 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 Microsoft.Azure.DevSpaces.Client.ManagementClients.ServiceManagementClientImplementation.d__96.MoveNext() --- 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.TaskAwaiter.ValidateEnd(Task task)
at Microsoft.Azure.DevSpaces.Client.ManagementClients.ServiceManagementClientImplementation.d__92.MoveNext() --- 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 Microsoft.Azure.DevSpaces.Client.ManagementClients.ServiceManagementClient.d__26.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Client.DevSpacesServiceClient.<>c__DisplayClass27_0.<b__1>d.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Logging.PerfLoggerExtensions.d__2.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Client.DevSpacesServiceClient.<>c__DisplayClass27_0.<b__0>d.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Logging.PerfLoggerExtensions.d__31.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Logging.PerfLoggerExtensions.<ExecuteOperationAsync>d__31.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Package.Services.DebugService.d__25.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Package.Services.BackgroundWarmupService.<>c__DisplayClass11_0.<b__0>d.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Logging.PerfLoggerExtensions.d__2.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Azure.DevSpaces.Tools.Common.Logging.PerfLoggerExtensions.d__2.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Package.Services.BackgroundWarmupService.d__11.MoveNext() --- 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 Microsoft.VisualStudio.Azure.DevSpaces.Tools.Package.Services.BackgroundWarmupService.<>c__DisplayClass9_0.<b__4>d.MoveNext() Enabling debugging... Using dev space 'default' with target 'myapp-hello' Release "azds-1d5814-default-webfrontend" does not exist. Installing it now. NAME: azds-1d5814-default-webfrontend LAST DEPLOYED: Wed Jun 26 15:53:29 2019 NAMESPACE: default STATUS: DEPLOYED RESOURCES: ==> v1/Service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE webfrontend ClusterIP 10.0.145.8 80/TCP
0s ==> v1beta1/Ingress NAME HOSTS ADDRESS PORTS AGE webfrontend default.webfrontend.wqlm7l5jbj.cus.azds.io 52.173.150.205 80 0s ==> v1beta2/Deployment NAME READY UP-TO-DATE AVAILABLE AGE webfrontend 0/1 0 0 0s NOTES: 1. Get the application URL by running these commands: http://default.webfrontend.wqlm7l5jbj.cus.azds.io/ Building container image... Sending build context to Docker daemon 3.927MB Step 1/13 : FROM mcr.microsoft.com/dotnet/core/sdk:2.2 ---> 155911c343f3 Step 2/13 : ARG BUILD_CONFIGURATION=Debug ---> Using cache ---> 0a860927aa11 Step 3/13 : ENV ASPNETCORE_ENVIRONMENT=Development ---> Using cache ---> 9aff467dfcc3 Step 4/13 : ENV DOTNET_USE_POLLING_FILE_WATCHER=true ---> Using cache ---> 4eec944c4cdb Step 5/13 : EXPOSE 80 ---> Using cache ---> 051a7179cc8d Step 6/13 : WORKDIR /src ---> Using cache ---> c265c50b4cb2 Step 7/13 : COPY ["Webfrontend/Webfrontend.csproj", "Webfrontend/"] ---> Using cache ---> 29e207ff4a3d Step 8/13 : RUN dotnet restore "Webfrontend/Webfrontend.csproj" ---> Using cache ---> 114d8778f570 Step 9/13 : COPY . . ---> Using cache ---> 45bccf0ad047 Step 10/13 : WORKDIR "/src/Webfrontend" ---> Using cache ---> 0b2cafae008c Step 11/13 : RUN dotnet build --no-restore "Webfrontend.csproj" -c $BUILD_CONFIGURATION ---> Using cache ---> e173184b7977 Step 12/13 : RUN echo "exec dotnet run --no-build --no-launch-profile -c $BUILD_CONFIGURATION --" > /entrypoint.sh ---> Using cache ---> 7ef376f04ab7 Step 13/13 : ENTRYPOINT ["/bin/bash", "/entrypoint.sh"] ---> Using cache ---> acf4addbf8a8 Successfully built acf4addbf8a8 Successfully tagged webfrontend:devspaces-x016b947dea959b9c Built container image in <1s Waiting for container... 4s

Service 'webfrontend' port 'http' is available at http://default.webfrontend.wqlm7l5jbj.cus.azds.io/ Service 'webfrontend' port 80 (http) is available via port forwarding at http://localhost:28228

Update

The popup box displays at the end of the text above.

Below will be displayed if succeed:

Service 'webfrontend' port 'http' is available at http://webfrontend.1234567890abcdef1234.eus.azds.io/

Service 'webfrontend' port 80 (http) is available at http://localhost:62266

Completed warmup for project 'webfrontend' in 125 seconds.

VS 2017, 19

Win 7