Uncaught DOMException: Blocked a frame with origin "https://music.domain.com" from accessing a cross-origin frame

I have Libretime accessible on two domain names via a reverse proxy.

One is libretime.domain1.org and that’s the actual host. The other is music.domain2.org. The site works perfectly fine via libretime.domain1.org.

When I access the site via music.domain2.org then I get the mentioned cross-origin error. I did define both domains including the https:// in the “Allowed CORS URLs” field under the settings.

  • In Firefox I just see the logo on the top right and the background image.

  • In Chrome I also see the calendar and the bar at the bottom to play the current song. But the two icons on the lower left to switch from calendar to Station Name are missing. Same in the new Edge browser.

It’s not really important, but I wonder if there’s a setting I can adjust to get that working too.