Extension hosted test not working

I’m having the same issue. No matter what I try I run into the following:

 Failed to execute ‘postMessage’ on ‘DOMWindow’: The target origin provided (‘https://supervisor.ext-twitch.tv’) does not match the recipient window’s origin (‘https://www.twitch.tv’).

I’m on Chrome latest, disabled all extensions. I tried both the vanilla example and my bundled vue project. No bundle size issues.

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This error indicated is unrelated to your extension not working.

Please use the network, console, or inspect elements, tabs of the inspector to trace and apply standard website debugging.

Common issues include:

  • use an absolute link to your JS file instead of a relative one
  • you uploaded a zip of a folder of files instead of a zip of files