Not able to reach any selector using iframe:iframe

Hi everyone.
I've been using the iframe:iframe property for quite a while without any issue.
A website I was scraping changed the UI recently and I can't seem to reach the content of the iframe anymore.
I can't get any HTML selector within the iframe when using iframe:iframe

There's no output from this simple snippet of code

Any suggestion on why this is happening?

{
   "_id":"test",
   "startUrl":[
      "https://app.wealthica.com/transactions"
   ],
   "selectors":[
      {
         "id":"iframe_test",
         "type":"SelectorHTML",
         "parentSelectors":[
            "_root"
         ],
         "selector":"iframe:iframe html",
         "multiple":false,
         "regex":"",
         "delay":0
      }
   ]
}

The HTML of the website is this...

I've already tried to use the iframe URL as sitemap URL but this iframe returns
"target window is same as present window -- not allowed"

<div class="section-content"><iframe src="https://addons.wealthica.com/wealthica/wealthica-transactions-addon/" title="addon" log="true" sandbox="
      allow-scripts
      allow-same-origin
      allow-top-navigation
      allow-popups
      allow-forms
      allow-modals
      allow-downloads
      " id="iFrameResizer0" scrolling="no" style="overflow: hidden; height: 3444px;">
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta http-equiv="Content-type" content="text/html; charset=utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <link rel="icon" href="favicon.ico">
  <title>wealthica-transactions-addon</title>
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lato:300italic,400italic,700italic,900italic,300,400,700,900&amp;subset=latin">
  <link href="assets/css/app.e635d60f.css" rel="preload" as="style">
  <link href="assets/css/chunk-vendors.24bf1742.css" rel="preload" as="style">
  <link href="assets/js/app.4c656494.js" rel="preload" as="script">
  <link href="assets/js/chunk-vendors.20a91009.js" rel="preload" as="script">
  <link href="assets/css/chunk-vendors.24bf1742.css" rel="stylesheet">
  <link href="assets/css/app.e635d60f.css" rel="stylesheet">
  <style type="text/css">
    .resize-observer[data-v-8859cc6c] {
      position: absolute;
      top: 0;
      left: 0;
      z-index: -1;
      width: 100%;
      height: 100%;
      border: none;
      background-color: transparent;
      pointer-events: none;
      display: block;
      overflow: hidden;
      opacity: 0
    }

    .resize-observer[data-v-8859cc6c] object {
      display: block;
      position: absolute;
      top: 0;
      left: 0;
      height: 100%;
      width: 100%;
      overflow: hidden;
      pointer-events: none;
      z-index: -1
    }
  </style>
</head>

<body><noscript><strong>We're sorry but wealthica-transactions-addon doesn't work properly without JavaScript enabled. Please enable it to continue.</strong></noscript>
  <div data-v-6e1dff6f="" id="app" class="app">

    <!-- THE SELECTORS I NEED TO REACH  -->
  </div>
</body>

</html>

You can diagnose with iframe:iframe body to see if anything is being extracted. That should produce a whole bunch of Html and you can check if what you require is within.

If the Html is hard to read, you can paste the code in HTML Formatter

@leemeng That's exactly what I did in the sitemap above. I've also tried with iframe:iframe body instead of iframe:iframe html but the result is the same. In the preview window Webscraper returns

No Data Extracted

And this is the same HTML I pasted above. The blue line is the info I need to reach but somehow the site seems to not allow me to see the content of the iframe.

Is it possible that some JS is preventing the scraper to reach the HTML?