Plugin : Non Null Origin iFrame

Hey there, I’m looking for help setting up the UI for a Figma plugin.

I am using a non-null origin, and testing the code using “https://www.google.com”

figma.showUI(
  `<script>
    window.location.href = "https://www.google.com";
    console.log(window.origin); //null
  </script>`,
  { height: 600, width: 400 }
);

I’ve included google in the manifest as an allowed domain.

  "networkAccess": {
    "allowedDomains": ["https://www.google.com",
      "https://*.google.com"
    ],
    "reasoning" : "For testing purposes",
    "devAllowedDomains": [
      "https://wwww.google.com",
    "https://*.google.com"
  ]
  }

All I see in the plugin window is a white box. The console isn’t throwing any syntax or permission errors.

Does anyone have a suggested fix? Is there something “basic” that I’m missing? (like, not testing showUI with google)

Thank you for your time.