I am having trouble getting <q2-data-table> tecton component to work.

Should be pretty simple... I've tried a number of different ways... other q2 UI components seem to work. In the below example, btn_submit is retrieved and set to disabled... However, the q2-data-table (as copied from the example in https://tecton.q2developer.com/ui/q2-data-table ) is not displayed. Simple example, in templates/index.html.jinja2:

(Apologies for the formatting... not working so well)

<q2-data-table id="accounttable" name="accounttable" caption="Recent Sales">
</q2-data-table>
<q2-btn intent="workflow-primary" id=btn_submit onclick="validateForm(event)">Get Transaction History
</q2-btn>
<script src="{{ this.base_assets_url }}/index.js"></script>

In frontend/index.js

```

// This code will execute after tecton has initialized.
tecton.connected.then(function() {

  const accountlist = document.querySelector('q2-data-table');
  const btn = document.getElementById('btn_submit');
  btn.disabled = true;
  btn.intent = "workflow-secondary";

  accountlist.headers = [
    {
      title: 'Day of Week',
      key: 'day',
    },
    { 
      title: 'Sales', 
      key: 'sales', 
      align: 'center'
    },
  ];
  accountlist.rows = [
    {
      id: 1,
      cells: {
        day: 'Monday',
        sales: 93,
      },
    },
    {
      id: 2,
      cells: {
        day: 'Tuesday',
        sales: 127,
      },
    },
    {
      id: 3,
      cells: {
        day: 'Wednesday',
        sales: 121,
      },
    }
  ];

  //alert("Title: " & accountlist.id);

});

	
I did notice that q2-data-table is not listed in https://cdn4.onlineaccess1.com/cdn/base/tecton/v1.25/Documentation/ui  while it is listed in https://tecton.q2developer.com/ui
	
	
Please advise.   Thanks!