Title: Error Failed to execute ‘postMessage’ on ‘DOMWindow’ Last modified: May 8, 2023 --- # Error Failed to execute ‘postMessage’ on ‘DOMWindow’ * [noviia](https://wordpress.org/support/users/noviia/) * (@noviia) * [2 years, 11 months ago](https://wordpress.org/support/topic/error-failed-to-execute-postmessage-on-domwindow/) * Hi, I added your plugin on the website [https://www.galianosfx.com/](https://www.galianosfx.com/), as you can see I have this error w-widgetapi.js:1119 Failed to execute ‘postMessage’ on ‘DOMWindow’: The target origin provided (‘[https://www.youtube.com’](https://www.youtube.com’);) does not match the recipient window’s origin (‘[https://www.galianosfx.com’](https://www.galianosfx.com’);). * Before I used to see all the videos but now don’t see them anymore, I noticed that the field YouTube API Key is not filled up but I don’t know if it’s the cause of the error. * Could you tell me if it depens on it? * Thanks * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-failed-to-execute-postmessage-on-domwindow%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ The topic ‘Error Failed to execute ‘postMessage’ on ‘DOMWindow’’ is closed to new replies. * ![](https://ps.w.org/youtube-embed-plus/assets/icon-256x256.png?rev=2165403) * [Embed Plus for YouTube Gallery, Livestream and Lazy Loading with Facades](https://wordpress.org/plugins/youtube-embed-plus/) * [Frequently Asked Questions](https://wordpress.org/plugins/youtube-embed-plus/#faq) * [Support Threads](https://wordpress.org/support/plugin/youtube-embed-plus/) * [Active Topics](https://wordpress.org/support/plugin/youtube-embed-plus/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/youtube-embed-plus/unresolved/) * [Reviews](https://wordpress.org/support/plugin/youtube-embed-plus/reviews/) * 0 replies * 1 participant * Last reply from: [noviia](https://wordpress.org/support/users/noviia/) * Last activity: [2 years, 11 months ago](https://wordpress.org/support/topic/error-failed-to-execute-postmessage-on-domwindow/) * Status: not resolved