Title: Missing warning when certain modules are not installed
Last modified: April 22, 2020

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# Missing warning when certain modules are not installed

 *  Resolved [lehmax](https://wordpress.org/support/users/lehmax/)
 * (@lehmax)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/missing-warning-when-certain-modules-are-not-installed/)
 * The Compatibility Check shows me that mod_expires and mod_ext_filter are not 
   installed. It also shows this message: “(required for disk enhanced Page Cache
   and Browser Cache)”. Even though two modules are missing, I was able to enable
   both features without a single warning or them being greyed out. My suggestions
   to fix this:
 * 1. Grey out fields if requirements are not met.
    2. Show warning outside of the
   Compatibility Check when users are trying to enable a certain feature and requirements
   are not met. 3. Nice-to-have: Use /wp-admin/site-health.php to show missing modules.
   This makes sure that users also see issues on the Dashboard.

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

 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/missing-warning-when-certain-modules-are-not-installed/#post-12713153)
 * Hello [@lehmax](https://wordpress.org/support/users/lehmax/)
 * Thank you for your suggestion.
    Not detected means you don’t use mod_php mode,
   so you probably use PHP-fpm. We cannot detect Apache modules in that case, but
   that doesn’t mean it is not installed/active. We are working on improving and
   once again thank you for your suggestion. I’ve also created a [GitHub](https://github.com/W3EDGE/w3-total-cache/issues/176)
   issue in our repository on your behalf. Please make sure to track the progress
   of the ticket regularly. Thanks!
 *  Thread Starter [lehmax](https://wordpress.org/support/users/lehmax/)
 * (@lehmax)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/missing-warning-when-certain-modules-are-not-installed/#post-12713294)
 * Thank you for opening the issue and answering quickly. Other modules are shown
   as installed and in green color so I’m 99 % sure that we’re using mod_php. They
   would be shown as yellow if we were not using it, right?
 *  Plugin Contributor [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * (@vmarko)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/missing-warning-when-certain-modules-are-not-installed/#post-12713696)
 * Hello [@lehmax](https://wordpress.org/support/users/lehmax/)
 * The yellow is for not installed.
    For example:
 *     ```
       mod_deflate: Not detected (required for disk enhanced Page Cache and Browser Cache)
       mod_env: Not detected (required for disk enhanced Page Cache and Browser Cache)
       mod_expires: Not detected (required for disk enhanced Page Cache and Browser Cache)
       ```
   
 * Even if Compatibility mode is showing not detected it doesn’t mean that they 
   are not installed and enabled and as you said yourself everything works as expected.
   
   Thanks!

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

The topic ‘Missing warning when certain modules are not installed’ is closed to 
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## Tags

 * [compatibility](https://wordpress.org/support/topic-tag/compatibility/)
 * [modules](https://wordpress.org/support/topic-tag/modules/)

 * 3 replies
 * 2 participants
 * Last reply from: [Marko Vasiljevic](https://wordpress.org/support/users/vmarko/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/missing-warning-when-certain-modules-are-not-installed/#post-12713696)
 * Status: resolved