Target API HV000028: Unexpected exception during isValid call

[#1]

Trying to hit a basic Target API call through postman, following the instructions found here: https://developers.adobetarget.com/api/delivery-api/#section/User-Permissions-(Premium)

Getting the following error: HV000028: Unexpected exception during isValid call

details:

POST  https://<clientID>.tt.omtrdc.net/rest/v1/delivery?client=<clientID>&sessionId=d359234570e04f14e1faee...

payload:

{

      "context": {

        "channel": "web",

        "browser" : {

          "host" : "demo"

        },

        "address" : {

          "url" : "http://demo.dev.tt-demo.com/demo/store/index.html"

        },

        "screen" : {

          "width" : 1200,

          "height": 1400

        }

      },

      "property" : {

        "token": "25ab4fa4-da59-b461-e442-1ab323f125dd"

      },

        "execute": {

        "mboxes" : [

          {

            "name" : "target-global-mbox",

            "index" : 1

          }

        ]

      }

    }

[stevemalko]

I have provided the property token and local mbox name in the POST API, I was able to get the 200 response

POST > https://xxx.tt.omtrdc.net/rest/v1/delivery?client=xxx&sessionId=100290adcb6a14043309f8789b21b0c18ba

Body as raw > json 

{

      "context": {

        "channel": "web",

        "browser" : {

          "host" : "production"

        },

        "address" : {

          "url" : "http://somewebsite.test.com/"

        },

        "screen" : {

          "width" : 1200,

          "height": 1400

        }

      },

      "property" : {

        "token": "f6fb2018-92d3-f3f5-36ee-40e7affb1804"

      },

        "execute": {

        "mboxes" : [

          {

            "name" : "customMbox",

            "index" : 1

          }

        ]

      }

}

Can you try with some local mbox nae and not the global mbox name ?

[stevemalko]

Ive replaced my payload with the one your provided, including the sessionID.....still the same error.

The question i have is how to I create a local mbox? In my Target settings, i only see "global mbox"....in the A/B experience I created, i manually typed in a new mbox name "test-mbox"....what am I missing?