Title: Error 500 when turn on CSS optimize
Last modified: September 8, 2019

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# Error 500 when turn on CSS optimize

 *  [alemaskin](https://wordpress.org/support/users/alemaskin/)
 * (@alemaskin)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/)
 * Need some help. JS and HTML optimization works without errors. But as soon as
   I enable optimization CSS-site stops working and gives an error 500.
    I’m bad
   at programming. I will be very glad of any help. On the server, all PHP settings
   are at maximum. Inside the module AO tried any combination of checkboxes. Doesn’t
   want to work. Thanks again for your help. Here is a screenshot of the error logs
   that occur when you enable CSS optimization – [http://joxi.ru/5mdO6yqt3oMPkr](http://joxi.ru/5mdO6yqt3oMPkr)
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-500-when-turn-on-css-optimize%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11910917)
 * Can you check the PHP-errorlog for errors as well alemaskin ?
 *  Thread Starter [alemaskin](https://wordpress.org/support/users/alemaskin/)
 * (@alemaskin)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11910969)
 * All today’s logs – [https://yadi.sk/d/gErNDB55ROBerQ](https://yadi.sk/d/gErNDB55ROBerQ)
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11911048)
 * that looks like the webserver logs, you should also have a logfile somewhere 
   that has PHP-errors (or -warnings or -notices …) no?
 *  Thread Starter [alemaskin](https://wordpress.org/support/users/alemaskin/)
 * (@alemaskin)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11911572)
 * Enabled PHP error notifications. But nothing new appeared with error 500.
    Maybe
   an error in my PHP settings ? Follow the link all my PHP settings – [https://yadi.sk/i/OjwEk1m3bKWL5w](https://yadi.sk/i/OjwEk1m3bKWL5w)
 * Thank you very much again.
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11911650)
 * Doubt is, AO (and [the CSS optimizer](https://github.com/tubalmartin/YUI-CSS-compressor-PHP-port))
   is pretty low on requirements really .. Just to make sure; you don’t have any
   other plugin running that can do CSS optimization? Could be some kind of plugin
   conflict, maybe try disaling/ reenabling plugins one at a time to find out?

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

The topic ‘Error 500 when turn on CSS optimize’ is closed to new replies.

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 * 5 replies
 * 2 participants
 * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * Last activity: [6 years, 9 months ago](https://wordpress.org/support/topic/error-500-when-turn-on-css-optimize/#post-11911650)
 * Status: not resolved