Text Area Control Setup

I’m wondering if you’re trying to list multiple controls together incorrectly… If you can show us your surrounding code we can try and locate the error for you.

If I paste your code into an empty group it works just fine.

Empty Group:

{
    "groups": [
      PASTE YOUR CODE HERE  
    ]
}

Your Code:

{
  "title": "TextArea:",
   "properties": [{
     "title": "TextArea2",
     "property": "textarea",
     "textArea": {
       "default": "Hello World",
       "subtitle": "Subtitle"
     }
   }]
}

Result: