Failed to execute ‘postMessage’ on ‘DOMWindow’..

Getting a constant error repeating in console.

It repeats over and over quickly (count was over 1000 when I closed it) – eventually it freezes the browser and it becomes unresponsive.

General error:
Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('<URL>') does not match the recipient window's origin ('<URL>').

Detail:
www-widgetapi.js:757 Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('https://www.youtube.com') does not match the recipient window's origin ('https://example.com').

Note: My origin *is* HTTPS:// before you ask.

• This topic was modified 3 years, 9 months ago by 22-7ths.
• This topic was modified 3 years, 9 months ago by 22-7ths.
• This topic was modified 3 years, 9 months ago by 22-7ths.