Title: Failed to create critical CSS
Last modified: May 6, 2022

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# Failed to create critical CSS

 *  Resolved [ilreazionario](https://wordpress.org/support/users/ilreazionario/)
 * (@ilreazionario)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/failed-to-create-critical-css/)
 * Using getpack boost i get error trying to use function of critical css
 * 1) `Failed to generate Critical CSS
    An unexpected error has occurred. As this
   error may be temporary, please try and refresh the Critical CSS.
 * Hide error message
    It looks like this URL doesn’t match: [https://www.ilreazionario.com/](https://www.ilreazionario.com/)
   What to do Visit the page and complete the following troubleshooting steps. 1
   Visit the page and look at the protocol and host name to ensure it matches the
   one in your WordPress Administration Screen. 2 If not, then please reach out 
   to your hosting provider and ask why. 3 If you believe the issue is resolved,
   please try again.
 * Protocol
    https :// Host name [http://www.ilreazionario.com](http://www.ilreazionario.com)`
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ffailed-to-create-critical-css%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [ilreazionario](https://wordpress.org/support/users/ilreazionario/)
 * (@ilreazionario)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/failed-to-create-critical-css/#post-15623498)
 * update: Deactivating all plugins make this function work. now i’m trying to undestand
   what plugin blocks css generation by activatin one at once.
 *  Thread Starter [ilreazionario](https://wordpress.org/support/users/ilreazionario/)
 * (@ilreazionario)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/failed-to-create-critical-css/#post-15623514)
 * i found the plug in tha is in conflict with jetpack: HTTP Headers Di: Dimitar
   Ivanov
 *  Plugin Support [Mike Stott](https://wordpress.org/support/users/mikemayhem3030/)
 * (@mikemayhem3030)
 * [4 years, 1 month ago](https://wordpress.org/support/topic/failed-to-create-critical-css/#post-15627138)
 * Thanks [@ilreazionario](https://wordpress.org/support/users/ilreazionario/) for
   reporting this conflict – I’ve logged it as an issue and I’ll mark this thread
   as resolved (assuming you’ve deactivated the conflicting plugin)

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Failed to create critical CSS’ is closed to new replies.

 * ![](https://ps.w.org/jetpack-boost/assets/icon.svg?rev=2818794)
 * [Jetpack Boost - Website Speed, Performance and Critical CSS](https://wordpress.org/plugins/jetpack-boost/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/jetpack-boost/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/jetpack-boost/)
 * [Active Topics](https://wordpress.org/support/plugin/jetpack-boost/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/jetpack-boost/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/jetpack-boost/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [Mike Stott](https://wordpress.org/support/users/mikemayhem3030/)
 * Last activity: [4 years, 1 month ago](https://wordpress.org/support/topic/failed-to-create-critical-css/#post-15627138)
 * Status: resolved