Title: WordPress.org Live Previews
Last modified: November 20, 2025

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# WordPress.org Live Previews

 *  Resolved [Bero](https://wordpress.org/support/users/berislavgrgicak/)
 * (@berislavgrgicak)
 * [4 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/)
 * Hi,
 * My name is Bero and I work on the [WordPress Playground project. ](https://wordpress.org/playground/)
 * Smush Image Optimization currently doesn’t support [Live Previews](https://developer.wordpress.org/plugins/wordpress-org/previews-and-blueprints/)
   on its [WordPress.org plugin page](https://wordpress.org/plugins/wp-smushit/).
 * To help you get started with Live Previews I created a Blueprint that loads Smush
   Image Optimization, skips the onboarding flow, and opens the Dashboard page.
   
   You can find the [Blueprint on GitHub](https://gist.github.com/bgrgicak/c5ab1b7cf72f916bd5b879179c3fb0f5)
   or test in Playground by [opening this link.](https://playground.wordpress.net/?blueprint-url=https%3A%2F%2Fgist.githubusercontent.com%2Fbgrgicak%2Fc5ab1b7cf72f916bd5b879179c3fb0f5%2Fraw%2Fwp-smushit-blueprint.json)
 * Please let me know if there’s any way I can help!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwordpress-org-live-previews%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Support [Imran – WPMU DEV Support](https://wordpress.org/support/users/wpmudev-support9/)
 * (@wpmudev-support9)
 * [4 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18726574)
 * Hello [@berislavgrgicak](https://wordpress.org/support/users/berislavgrgicak/),
 * We hope you’re doing well.
 * Thank you for taking the time to create a blueprint and testing link for our 
   review. Our Smush team will review it shortly, and we will follow up with you
   soon.
 * We appreciate your efforts.
 * –
    Kind Regards, Imran Khan
 *  Plugin Support [Nithin – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport11/)
 * (@wpmudevsupport11)
 * [3 months, 1 week ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18772139)
 * Hi [@berislavgrgicak](https://wordpress.org/support/users/berislavgrgicak/),
 * We ran checks regarding this and noticed issues with how the plugin interacts
   in the Playground. It seems there are limitations on external API requests. We
   noticed the following error when the images uploaded were optimized via the plugin
   by running Smush:
 *     ```wp-block-code
       [medium] Error posting to API: Missing header/body separator
       ```
   
 * 
   Could we know if there are any restrictions on how the external API request 
   is supposed to work in the Playground? Any suggestions you have regarding the
   above that should be considered in Playground?
 * Looking forward to your response.
 * Regards,
 * Nithin
 *  Plugin Support [Dmytro – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport16/)
 * (@wpmudevsupport16)
 * [2 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18790213)
 * Hello [@berislavgrgicak](https://wordpress.org/support/users/berislavgrgicak/),
 * I hope you’re doing great today!
 * We haven’t heard from you for a while, so we’re marking this thread as resolved
   for now. Please feel free to reopen the thread when you have any further updates.
 * Best Regards,
    Dmytro
 *  Thread Starter [Bero](https://wordpress.org/support/users/berislavgrgicak/)
 * (@berislavgrgicak)
 * [2 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18791685)
 * Hi! 
   Sorry about the late, reply I missed your message.> Could we know if there
   are any restrictions on how the external API request is supposed to work in the
   Playground? Any suggestions you have regarding the above that should be considered
   in Playground?I didn’t recreate your error, but a common issue is CORS headers.
   When running Playground in the browser it can make requests only if CORS requests
   are allowed.
 * You can check that in the browser network tab, by observing the failing request.
 * If CORS requests aren’t allowed Playground will attempt to use it’s CORS proxy
   to work around it, but in the process it will strip some headers like `Authorization`.
   
   To work around it you could enable CORS requests in your API endpoints.Alternativly,
   you can add a `X-Cors-Proxy-Allowed-Request-Headers=Authorization` header to 
   your requests. This will allow Playground’s CORS Proxy to forward the Authorization
   header to your server. 
 * It might be hard to debug this over the support forum, feel free to ping me on
   the [WordPress community Slack](https://wordpress.slack.com/archives/D06G9K0N0SK)(
   @bero).
 *  Plugin Support [Nebu John – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport14/)
 * (@wpmudevsupport14)
 * [2 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18793022)
 * Hi [@berislavgrgicak](https://wordpress.org/support/users/berislavgrgicak/),
 * Thank you for getting back to us. I have shared the feedback with the Smush team
   for further review. We’ll reach out to you if we need any further clarification.
 * Thanks again.
 * Best Regards,
    Nebu John

Viewing 5 replies - 1 through 5 (of 5 total)

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 * 5 replies
 * 5 participants
 * Last reply from: [Nebu John – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport14/)
 * Last activity: [2 months, 3 weeks ago](https://wordpress.org/support/topic/wordpress-org-live-previews/#post-18793022)
 * Status: resolved