Bot returning error "payment required"

Question

I am running a bot deployed to an azure webapp. The bot runs fine in local debugging, and it runs fine in the web test client in the Azure portal.

I can connect to the bot from the bot framework emulator, and I can access its default html front page from a browser, but when I POST a message to the REST api it returns the following error.

I'm puzzled by the status code "PaymentRequired". I can't figure out where this comes from based on the stack trace. My bot is in the S1 Standard pricing tier. When I visit the App Service Plan blade, it says I'm in the Default0 (Free: 0 Small) plan. When I visit Change App Service Plan it says "No App Service Plans Found". For what it's worth, I don't think it's a LUIS issue because LUIS works fine when I connect from other clients.

Buffer="{ 
    "message": "An error has occurred.", 
    "exceptionMessage": "Operation returned an invalid status code 'PaymentRequired'", 
"exceptionType": "Microsoft.Bot.Connector.ErrorResponseException", 
"stackTrace":
    " at Microsoft.Bot.Connector.Conversations.<ReplyToActivityWithHttpMessagesAsync>d__9.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.Bot.Connector.ConversationsExtensions.<ReplyToActivityAsync>d__9.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.Bot.Builder.Dialogs.Internals.AlwaysSendDirect_BotToUser.<Microsoft-Bot-Builder-Dialogs-Internals-IBotToUser-PostAsync>d__4.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\ConnectorEx\BotToUser.cs:line 124
--- 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.Bot.Builder.Dialogs.Internals.InputHintQueue.<Microsoft-Bot-Builder-Dialogs-Internals-IMessageQueue-QueueMessageAsync>d__4.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\ConnectorEx\BotToUser.cs:line 184
--- 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.Bot.Builder.Dialogs.Internals.AutoInputHint_BotToUser.<Microsoft-Bot-Builder-Dialogs-Internals-IBotToUser-PostAsync>d__3.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\ConnectorEx\BotToUser.cs:line 146
--- 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.Bot.Builder.Dialogs.Internals.MapToChannelData_BotToUser.<PostAsync>d__3.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\ConnectorEx\BotToUser.cs:line 295
--- 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.Bot.Builder.Dialogs.Internals.LogBotToUser.<Microsoft-Bot-Builder-Dialogs-Internals-IBotToUser-PostAsync>d__4.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\ConnectorEx\IActivityLogger.cs:line 131
--- 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.Bot.Builder.Dialogs.Internals.DialogContext.<Microsoft-Bot-Builder-Dialogs-Internals-IBotToUser-PostAsync>d__12.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Dialogs\DialogContext.cs:line 87
--- 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.Bot.Builder.Dialogs.Extensions.<PostAsync>d__14.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Dialogs\IDialogContext.cs:line 150
--- 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 myBot.ExceptionHandlerDialog`1.<DisplayException>d__7.MoveNext() in C:\myBot\Dialogs\ExceptionHandlerDialog.cs:line 71
--- 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 myBot.ExceptionHandlerDialog`1.<ResumeAsync>d__5.MoveNext() in C:\myBot\Dialogs\ExceptionHandlerDialog.cs:line 47
--- 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.Bot.Builder.Dialogs.Internals.DialogTask.ThunkResume`1.<Rest>d__5.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Dialogs\DialogTask.cs:line 164
--- 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.Bot.Builder.Internals.Fibers.Wait`2.<Microsoft-Bot-Builder-Internals-Fibers-IWait<C>-PollAsync>d__19.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Fibers\Wait.cs:line 0
--- 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.Bot.Builder.Internals.Fibers.Frame`1.<Microsoft-Bot-Builder-Internals-Fibers-IFrameLoop<C>-PollAsync>d__9.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Fibers\Fiber.cs:line 0
--- 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.Bot.Builder.Internals.Fibers.Fiber`1.<Microsoft-Bot-Builder-Internals-Fibers-IFiberLoop<C>-PollAsync>d__16.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Fibers\Fiber.cs:line 0
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
 at Microsoft.Bot.Builder.Internals.Fibers.Wait`2.Microsoft.Bot.Builder.Internals.Fibers.IAwaiter<T>.GetResult() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Fibers\Wait.cs:line 378
 at Microsoft.Bot.Builder.Dialogs.Chain.LoopDialog`1.<ResumeAsync>d__3.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Dialogs\Chain.cs:line 752
--- 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.Bot.Builder.Dialogs.Internals.DialogTask.ThunkResume`1.<Rest>d__5.MoveNext() in D:\a\1\s\CSharp\Library\Microsoft.Bot.Builder\Dialogs\DialogTask.cs:line 164
--- 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.Bot.Builder.Internals.Fibers.Wait`2.<Microsoft-Bot-TRUNCATED..."

Answer 1

The only time I've seen '402 Payment Required' is when Ngrok limits come into play. Try restarting ngrok.

https://ngrok.com/pricing