arm-ttk does not recognize steps('basics').elementName as synonymous with basics('elementName')

[raouche]

arm-ttk version: 0.24
Scenario: A TextBox control named TextBox1 is placed in "basics". It is referenced in the "outputs" using this expression:
[steps('basics').TextBox1]

Problem: Upon running arm-ttk against the CUID, the following error is returned:

arm-ttk: Failed: Controls In Outputs Must Exist
  - Error: Could not find step 'basics' in .parameters.steps

NOTE: steps('basics').elememtName being the same as basics('elementName') is valid and runs fine in the CUID sandbox.

Sample CUID:

{
  "$schema": "https://schema.management.azure.com/schemas/0.1.2-preview/CreateUIDefinition.MultiVm.json#",
  "handler": "Microsoft.Azure.CreateUIDef",
  "version": "0.1.2-preview",
  "parameters": {
    "basics": [
      {
        "constraints": {
          "regex": "^[a-z0-9A-Z]{1,30}$",
          "validationMessage": "Only alphanumeric characters are allowed, and the value must be 1-30 characters long."
        },
        "label": "TextBox1",
        "name": "TextBox1",
        "toolTip": "TextBox1",
        "type": "Microsoft.Common.TextBox"
      }
    ],
    "steps": [],
    "outputs": {
      "location": "[location()]",
      "TextBox1": "[steps('basics').TextBox1]"
    }
  },
  "metadata": {
    "_generator": {
      "name": "MaestroStudio",
      "sku": "Solo",
      "version": "0.9.0.0",
      "template": {
        "author": "StratusOn",
        "id": "EA622966-CE0C-46E7-841B-73C2E6ED5DEB",
        "description": "A blank Azure Marketplace Managed Application offer."
      }
    },
    "_sync": {
      "offer": {
        "displayName": "My Offer"
      },
      "plan": {
        "displayName": "Plan"
      }
    }
  }
}