Publish to AWS not working - but Legacy publish works fine

[JCMReddie]

I installed the AWS Toolkit version 1.48.0.0.

When I try to publish to the AWS Region US East (Ohio) - after 2-3 minutes I get an error "Unable to start a deployment session: A task was canceled."

If I switch to the US East (N. Virginia) region - after several minutes I see the "Publish to New Target" and "Publish to Existing Target" options.

[JCMReddie]

Here is what I think is the appropriate message from the AWSToolkit logs:
2024-02-22 15:09:11,703 [41] ERROR Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel - Error setting deployment target
System.Threading.Tasks.TaskCanceledException: A task was canceled.
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at AWS.Deploy.ServerMode.Client.RestAPIClient.d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.DeployToolController.d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.DeployToolController.d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel.d__182.MoveNext()
2024-02-22 15:09:11,704 [41] ERROR Amazon.AWSToolkit.Publish.Views.PublishToAwsDocumentControl - Error reloading configuration details
System.Threading.Tasks.TaskCanceledException: A task was canceled.
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at AWS.Deploy.ServerMode.Client.RestAPIClient.d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.DeployToolController.d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.DeployToolController.d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel.d__182.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.Views.PublishToAwsDocumentControl.d__41.MoveNext()
2024-02-22 15:09:22,092 [227] ERROR Amazon.AWSToolkit.Publish.Views.PublishToAwsDocumentControl - Error refreshing publish state
Amazon.AWSToolkit.Publish.SessionException: Unable to start a deployment session:
A task was canceled. ---> System.Threading.Tasks.TaskCanceledException: A task was canceled.
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at AWS.Deploy.ServerMode.Client.RestAPIClient.d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.DeployToolController.d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel.d__162.MoveNext()
--- End of inner exception stack trace ---
at Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel.d__162.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.ViewModels.PublishToAwsDocumentViewModel.d__160.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.Views.PublishToAwsDocumentControl.d__28.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at Amazon.AWSToolkit.Publish.Views.PublishToAwsDocumentControl.d__27.MoveNext()