Mono.AndroidTools.InstallFailedException: Unexpected install output: Error: Could not access the Package Manager. Is the system running?

[john1726]

When I try to run the android application, here are the errors I'm getting, using Visual Studio 2015 Update 3:

1>100% ... 6793kb of 6793kb copied
1>:Deployment failed
1>Mono.AndroidTools.InstallFailedException: Unexpected install output: Error: Could not access the Package Manager.  Is the system running?
1>
1>   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
1>   at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass90_0.<InstallPackage>b__0(Task`1 t)
1>   at System.Threading.Tasks.ContinuationTaskFromResultTask`1.InnerInvoke()
1>   at System.Threading.Tasks.Task.Execute()
1>The "InstallPackageAssemblies" task failed unexpectedly.
1>System.AggregateException: One or more errors occurred. ---> Xamarin.AndroidTools.AndroidDeploymentException: InternalError ---> Mono.AndroidTools.InstallFailedException: Unexpected install output: Error: Could not access the Package Manager.  Is the system running?
1>
1>   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
1>   at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass90_0.<InstallPackage>b__0(Task`1 t)
1>   at System.Threading.Tasks.ContinuationTaskFromResultTask`1.InnerInvoke()
1>   at System.Threading.Tasks.Task.Execute()
1>   --- End of inner exception stack trace ---
1>   at Xamarin.AndroidTools.AndroidDeploySession.<RunLoggedAsync>d__99.MoveNext()
1>--- End of stack trace from previous location where exception was thrown ---
1>   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
1>   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
1>   at Xamarin.AndroidTools.AndroidDeploySession.<StartAsync>d__98.MoveNext()
1>   --- End of inner exception stack trace ---
1>   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
1>   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
1>   at System.Threading.Tasks.Task.Wait()
1>   at Xamarin.Android.Tasks.InstallPackageAssemblies.Execute()
1>   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
1>   at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
1>---> (Inner Exception #0) Xamarin.AndroidTools.AndroidDeploymentException: InternalError ---> Mono.AndroidTools.InstallFailedException: Unexpected install output: Error: Could not access the Package Manager.  Is the system running?
1>
1>   at Mono.AndroidTools.Internal.AdbOutputParsing.CheckInstallSuccess(String output, String packageName)
1>   at Mono.AndroidTools.AndroidDevice.<>c__DisplayClass90_0.<InstallPackage>b__0(Task`1 t)
1>   at System.Threading.Tasks.ContinuationTaskFromResultTask`1.InnerInvoke()
1>   at System.Threading.Tasks.Task.Execute()
1>   --- End of inner exception stack trace ---
1>   at Xamarin.AndroidTools.AndroidDeploySession.<RunLoggedAsync>d__99.MoveNext()
1>--- End of stack trace from previous location where exception was thrown ---
1>   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
1>   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
1>   at Xamarin.AndroidTools.AndroidDeploySession.<StartAsync>d__98.MoveNext()<---
1>
1>Done building project "LoginPattern.Android.csproj" -- FAILED.
1>Build FAILED.
1>
========== Deploy: 0 succeeded, 1 failed, 0 skipped ==========

Does anyone have any suggestions? TIA.

[StephenLYC]

Hello.How to solve it?