we had the embeds not working and implemented the parent parameter that fixed our issues.
But we also have a CMS preview which is rendered in an iframe.
So we have to deal with vorschau.domain.de displaying rendering.domain.de with an embed iframe for twitch channel.
First, we got CORS issues and added a CORS header with a value of *. Now we have the same error as we had without parent param. So we tried both parent= rendering.domain.de and parent=vorschau.domain.de.
Unfortunately, we can’t fix it that way.
Do you guys have any clue how to fix this issue?