Title: Brian's Replies | WordPress.org

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# Brian

  [  ](https://wordpress.org/support/users/brianjaye/)

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 *   [Reviews Written](https://wordpress.org/support/users/brianjaye/reviews/)
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## Forum Replies Created

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

 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Jetpack Boost - Website Speed, Performance and Critical CSS] Jetpack + Autoptimize](https://wordpress.org/support/topic/jetpack-autoptimize/)
 *  Thread Starter [Brian](https://wordpress.org/support/users/brianjaye/)
 * (@brianjaye)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/jetpack-autoptimize/#post-16010156)
 * Autoptimize contains the API Key for criticalcss.com. When I deactivate Autoptimize,
   Jetpack Boost won’t generate critical css because the API is disabled. When Autoptimize
   is activated, Jetpack Boost will now generate critical css.
 * Am I missing something? Is there another way to get the critical css API enabled
   for Jetpack Boost without doing it through Autoptimize?
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Jetpack Boost - Website Speed, Performance and Critical CSS] Jetpack + Autoptimize](https://wordpress.org/support/topic/jetpack-autoptimize/)
 *  Thread Starter [Brian](https://wordpress.org/support/users/brianjaye/)
 * (@brianjaye)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/jetpack-autoptimize/#post-15971019)
 * Here’s the error message that I got when I deactivated Autoptimize and tried 
   to generate Critical CSS with Jetpack.
 *     ```
       Failed to generate Critical CSS
       An unexpected error has occurred. As this error may be temporary, please try and refresh the Critical CSS.
   
       Error: Your site's REST API does not seem to be accessible. Jetpack Boost requires access to your REST API in order to receive site performance scores. Please make sure that your site's REST API is active and accessible, and try again.
       ```
   
 *   Forum: [Plugins](https://wordpress.org/support/forum/plugins-and-hacks/)
    In
   reply to: [[Jetpack Boost - Website Speed, Performance and Critical CSS] Jetpack + Autoptimize](https://wordpress.org/support/topic/jetpack-autoptimize/)
 *  Thread Starter [Brian](https://wordpress.org/support/users/brianjaye/)
 * (@brianjaye)
 * [3 years, 9 months ago](https://wordpress.org/support/topic/jetpack-autoptimize/#post-15963858)
 * Autoptimize contains the API key. With Autoptimize deactivated, Jetpack is unable
   to use the option ‘Optimize CSS Loading’. I have the free version of Jetpack 
   by the way.

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