"Authentication error: Unable to respond to any of these challenges" when trying to update the contact table

Hi,I am trying to play with this example to see what is possible but getting the error:
Authentication error: Unable to respond to any of these challenges: {}
When I try to add new contacts in the contact table using AddContactTask: Below is is the output I am getting,any pointers on what I might be doing wrong?

invokeAPI() called with: host = [https://df-ft-wayadn.enterprise.dreamfactory.com/api/v2], path = [/db/_table/contact], method = [POST], queryParams = [null], body = [{"first_name":"Gakwaya","twitter":"Twitt","image_url":"Image.png","last_name":"Daniel","notes":"Note","skype":"nSkype","id":51}], headerParams = [{X-DreamFactory-Session-Token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOjMsInVzZXJfaWQiOjMsImVtYWlsIjoid2F5YWRuODhAZ21haWwuY29tIiwiZm9yZXZlciI6ZmFsc2UsImlzcyI6Imh0dHBzOlwvXC9kZi1mdC13YXlhZG4uZW50ZXJwcmlzZS5kcmVhbWZhY3RvcnkuY29tXC9hcGlcL3YyXC91c2VyXC9zZXNzaW9uIiwiaWF0IjoxNDYzOTc0MjM2LCJleHAiOjE0NjM5Nzc4MzYsIm5iZiI6MTQ2Mzk3NDIzNiwianRpIjoiNWIwODRlYThlZmZlZTBhZTUxYzdjMmQ4ZThkMDdmYzYifQ.9mfHzj_01-Ib5poK8TniJ9KEjC2_0ANb-2QaxLR2D2g, X-DreamFactory-Api-Key=20bd49da217c202bbef4f02b5c048703a9yyyyyyyyyyf57e096c1dad34934970}], contentType = [application/json], fileRequest = [null] 05-23 14:42:38.706 28430-28495/com.blikoon.dreamfactorytest W/DefaultRequestDirector: Authentication error: Unable to respond to any of these challenges: {} 05-23 14:42:38.716 28430-28495/com.blikoon.dreamfactorytest E/AddContactTask: going to on_failure() for an ApiException 05-23 14:42:38.716 28430-28495/com.blikoon.dreamfactorytest E/AddContactTask::baserequest::onError: com.blikoon.dreamfactorytest.dfapi.ApiException: {"error":{"context":null,"message":"Token has expired","code":401,"trace":["0 [internal function]: DreamFactory\\Http\\Middleware\\AccessCheck->handle(Object(Illuminate\\Http\\Request), Object(Closure))","1 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9511): call_user_func_array(Array, Array)","2 [internal function]: Illuminate\\Pipeline\\Pipeline->Illuminate\\Pipeline\\{closure}(Object(Illuminate\\Http\\Request))","3 /var/www/_releases/instance/dreamfactory/2.0.4/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(32): call_user_func(Object(Closure), Object(Illuminate\\Http\\Request))","4 [internal function]: Illuminate\\Routing\\Pipeline->Illuminate\\Routing\\{closure}(Object(Illuminate\\Http\\Request))","5 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9501): call_user_func(Object(Closure), Object(Illuminate\\Http\\Request))","6 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9025): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))","7 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9012): Illuminate\\Routing\\ControllerDispatcher->callWithinStack(Object(DreamFactory\\Http\\Controllers\\RestController), Object(Illuminate\\Routing\\Route), Object(Illuminate\\Http\\Request), 'handlePOST')","8 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(8099): Illuminate\\Routing\\ControllerDispatcher->dispatch(Object(Illuminate\\Routing\\Route), Object(Illuminate\\Http\\Request), 'DreamFactory\\Ht...', 'handlePOST')","9 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(8086): Illuminate\\Routing\\Route->runController(Object(Illuminate\\Http\\Request))","10 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(7800): Illuminate\\Routing\\Route->run(Object(Illuminate\\Http\\Request))","11 [internal function]: Illuminate\\Routing\\Router->Illuminate\\Routing\\{closure}(Object(Illuminate\\Http\\Request))","12 /var/www/_releases/instance/dreamfactory/2.0.4/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(52): call_user_func(Object(Closure), Object(Illuminate\\Http\\Request))","13 [internal function]: Illuminate\\Routing\\Pipeline->Illuminate\\Routing\\{closure}(Object(Illuminate\\Http\\Request))","14 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9501): call_user_func(Object(Closure), Object(Illuminate\\Http\\Request))","15 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(7801): Illuminate\\Pipeline\\Pipeline->then(Object(Closure))","16 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(7792): Illuminate\\Routing\\Router->runRouteWithinStack(Object(Illuminate\\Routing\\Route), Object(Illuminate\\Http\\Request))","17 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(7782): Illuminate\\Routing\\Router->dispatchToRoute(Object(Illuminate\\Http\\Request))","18 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(2393): Illuminate\\Routing\\Router->dispatch(Object(Illuminate\\Http\\Request))","19 [internal function]: Illuminate\\Foundation\\Http\\Kernel->Illuminate\\Foundation\\Http\\{closure}(Object(Illuminate\\Http\\Request))","20 /var/www/_releases/instance/dreamfactory/2.0.4/vendor/laravel/framework/src/Illuminate/Routing/Pipeline.php(52): call_user_func(Object(Closure), Object(Illuminate\\Http\\Request))","21 /var/www/_releases/instance/dreamfactory/2.0.4/vendor/dreamfactory/df-managed/src/Http/Middleware/ClusterAuditor.php(45): Illuminate\\Routing\\Pipeline->Illuminate\\Routing\\{closure}(Object(Illuminate\\Http\\Request))","22 [internal function]: DreamFactory\\Managed\\Http\\Middleware\\ClusterAuditor->handle(Object(Illuminate\\Http\\Request), Object(Closure))","23 /var/www/_releases/instance/dreamfactory/2.0.4/bootstrap/cache/compiled.php(9511): call_user_func_array(Array, Array)","24 [in