The botconnectorapi from kokkoon

NullReferenceException: Object reference not set to an instance of an object

I was following the following Twillio blog to connect Power Virtual Agents (PVA) bots to Twilio using a Relay Bot in C# (link).

I cloned this project as mentioned in the blog, where I proceeded to update the parameters to the appSettings.json file with the values collected from the PVA bot.

I then ran the C# project using the dotnet watch run from within the project folder in my terminal. This loaded up a Swagger page on http://localhost:5157/swagger/index.html, which I then used to test the relay bot.

After filling in the From and Body parameters in the request, I executed the API request, which failed.

Here is the error log from the terminal:

Please note that I have changed the from number to something random, but in the actual request, I did put in the correct Twilio phone number.

From: +19999999999, hi
s_tokens: eyJhbGciOiJSUzI1NiIsImtpZCI6Ii1FMmRMMlhXZ2tCSTNmLV93MTNrWUE0YXBXTSIsIng1dCI6Ii1FMmRMMlhXZ2tCSTNmLV93MTNrWUE0YXBXTSIsInR5cCI6IkpXVCJ9.eyJib3QiOiJmOWFkYzJiZC01YmZjLTRiNWUtYTA3Zi1kYzY4OTdjMDQ1YmQiLCJzaXRlIjoiSEp6eE1STjBTcGciLCJjb252IjoiNFRTRHNxWUlGZHEzT0FaRFRCOXdMei1ldSIsInVzZXIiOiIyOTNkZGNiMi0zNzA5LTRlNDItOGNlZS00NTUxNmY3YTFiNDEiLCJuYmYiOjE2ODQzNDczMDksImV4cCI6MTY4NDM1MDkwOSwiaXNzIjoiaHR0cHM6Ly9kaXJlY3RsaW5lLmJvdGZyYW1ld29yay5jb20vIiwiYXVkIjoiaHR0cHM6Ly9kaXJlY3RsaW5lLmJvdGZyYW1ld29yay5jb20vIn0.jYx9HCxOFTYNS68MwIc-XejfiKRQF08zLQMv4RCIIukaSHE-fbljFw8jHjhqgTTmEMCyCxGfOmfa36Kv1kJQ8VXkUluOtReolyONVtMjvozs_1Tyif33CVFKDfW9ef-iyMCVWmOOEi5JO9sPoREASbjjJDzTSNLwKsdTjnEUtcmFMiLuOEtB6mm1YMtuNOpej4fWL70jiB94o5UepbSx8dKdvk3qpe_K_PofVuVypwiGOgkSKTgkMpqEqUnzxLQqPI1qPJnSV635k_4I2P_x1cDMjUQ2d-g5AKhqeEtPNfqcbt4ULD76_cdslTWQHOE5Ky6z7LggOHPmJKtXsxPnKg
token: eyJhbGciOiJSUzI1NiIsImtpZCI6Ii1FMmRMMlhXZ2tCSTNmLV93MTNrWUE0YXBXTSIsIng1dCI6Ii1FMmRMMlhXZ2tCSTNmLV93MTNrWUE0YXBXTSIsInR5cCI6IkpXVCJ9.eyJib3QiOiJmOWFkYzJiZC01YmZjLTRiNWUtYTA3Zi1kYzY4OTdjMDQ1YmQiLCJzaXRlIjoiSEp6eE1STjBTcGciLCJjb252IjoiNFRTRHNxWUlGZHEzT0FaRFRCOXdMei1ldSIsInVzZXIiOiIyOTNkZGNiMi0zNzA5LTRlNDItOGNlZS00NTUxNmY3YTFiNDEiLCJuYmYiOjE2ODQzNDczMDksImV4cCI6MTY4NDM1MDkwOSwiaXNzIjoiaHR0cHM6Ly9kaXJlY3RsaW5lLmJvdGZyYW1ld29yay5jb20vIiwiYXVkIjoiaHR0cHM6Ly9kaXJlY3RsaW5lLmJvdGZyYW1ld29yay5jb20vIn0.jYx9HCxOFTYNS68MwIc-XejfiKRQF08zLQMv4RCIIukaSHE-fbljFw8jHjhqgTTmEMCyCxGfOmfa36Kv1kJQ8VXkUluOtReolyONVtMjvozs_1Tyif33CVFKDfW9ef-iyMCVWmOOEi5JO9sPoREASbjjJDzTSNLwKsdTjnEUtcmFMiLuOEtB6mm1YMtuNOpej4fWL70jiB94o5UepbSx8dKdvk3qpe_K_PofVuVypwiGOgkSKTgkMpqEqUnzxLQqPI1qPJnSV635k_4I2P_x1cDMjUQ2d-g5AKhqeEtPNfqcbt4ULD76_cdslTWQHOE5Ky6z7LggOHPmJKtXsxPnKg
fail: Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware[1]
      An unhandled exception has occurred while executing the request.
      System.NullReferenceException: Object reference not set to an instance of an object.
         at myBotConnector.Controllers.BotConnectorController.StartConversation(String inputMsg, String token) in C:\Users\rawatsid\Documents\BotConnectorAPI\Controllers\myBotConnectorController.cs:line 67
         at myBotConnector.Controllers.BotConnectorController.StartBot(String From, String Body) in C:\Users\rawatsid\Documents\BotConnectorAPI\Controllers\myBotConnectorController.cs:line 55
         at lambda_method5(Closure, Object)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
         at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
         at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

If I'm not wrong, the above error points to the myBotConnectorController.cs file, at line 67:

    private async Task<string> StartConversation(string inputMsg, string token)
    {
        Console.WriteLine("token: " + token);
        using (var directLineClient = new DirectLineClient(token))
        {
            var conversation = await directLineClient.Conversations.StartConversationAsync();
            var conversationtId = conversation.ConversationId;//FAIL HERE

I'm unable to debug what could be the possible problem here. Any idea as to what might be causing this problem?

not able to test it getting NullReferenceException

i dont think there is any error in the code but somehow not sure if we are giving the correct details in appsettings.json.
Please guide what details need to be provided in the appsettings.json

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NullReferenceException: Object reference not set to an instance of an object

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not able to test it getting NullReferenceException

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