Title: Activating CSS Optimizing ends in Error 500 Internal Server Error Last modified: August 22, 2016 --- # Activating CSS Optimizing ends in Error 500 Internal Server Error * Resolved [blondsign](https://wordpress.org/support/users/blondsign/) * (@blondsign) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/) * Hi there, * when I am activating the CSS Optimizing in Autoptimize my site is crashing completely and runs into an Internal Server Error. I am running wordpress with Woocommerce and the Shopkeeper theme. * Anyone has a clue to fix that? * [http://www.moebellagernord.de ](http://moebellagernord.de/) * Cheers, Eike * [https://wordpress.org/plugins/autoptimize/](https://wordpress.org/plugins/autoptimize/) Viewing 8 replies - 1 through 8 (of 8 total) * Plugin Author [Frank Goossens](https://wordpress.org/support/users/futtta/) * (@futtta) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799244) * Afternoon Eike; Have a look at [the FAQ](https://wordpress.org/plugins/autoptimize/faq/), esp. the “Help, I have a blank page after enabling Autoptimize!!”-part. * Hope this helps, frank * Thread Starter [blondsign](https://wordpress.org/support/users/blondsign/) * (@blondsign) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799255) * With the legacy thing in the wp-config.php, the CSS now works fine. * But I have some trouble with the JS Optimizing. I tick the Checkboxes, but nothing happens, when I check it on page speed insights and Kingdom tools. * So what do I wrong? * Cheers, Eike * Plugin Author [Frank Goossens](https://wordpress.org/support/users/futtta/) * (@futtta) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799256) * no idea, should have a link to your site to be able to see if and why JS is or is not optimized really 🙂 * frank * Thread Starter [blondsign](https://wordpress.org/support/users/blondsign/) * (@blondsign) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799257) * [http://moebellagernord.de/](http://moebellagernord.de/) * Thank you! * Plugin Author [Frank Goossens](https://wordpress.org/support/users/futtta/) * (@futtta) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799261) * OK, so there is JS optimization (e.g. [http://moebellagernord.de/wp-content/cache/autoptimize/js/autoptimize_20a116e028cfd7d10fef58e493291de5.js](http://moebellagernord.de/wp-content/cache/autoptimize/js/autoptimize_20a116e028cfd7d10fef58e493291de5.js)), but a lot of files seem not to have been aggregated by Autoptimize. What JS optimization options are active? anything in the “exclude from optimization”-field? * frank * Thread Starter [blondsign](https://wordpress.org/support/users/blondsign/) * (@blondsign) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799265) * Well, I missed that, but should be better optimizing, aye? * I checked the first and second options. So Activating JS at all and Forcing the Header * Thread Starter [blondsign](https://wordpress.org/support/users/blondsign/) * (@blondsign) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799266) * this ist on the excluding list. * s_sid,smowtion_size,sc_project,WAU_,wau_add,comment-form-quicktags,edToolbar, ch_client,nonce,post_id * Plugin Author [Frank Goossens](https://wordpress.org/support/users/futtta/) * (@futtta) * [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799468) * Afternoon Eike; Had another look at your site and not sure if you changed anything, but the autoptimized js-files now seem to have a lot more JS in them. * When comparing pagespeed score with and without AO I see a significant difference; [HP without OA](https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fmoebellagernord.de%2F%3Fao_noptimize%3D1&tab=desktop): 53 [HP with OA](https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fmoebellagernord.de%2F&tab=desktop): 69 [Shop without OA](https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fmoebellagernord.de%2Fshop%2F%3Fao_noptimize%3D1&tab=desktop): 44 [Shop with OA](https://developers.google.com/speed/pagespeed/insights/?url=http%3A%2F%2Fmoebellagernord.de%2Fshop%2F&tab=desktop): 78 * Although some further optimizations of CSS/JS delivery would be possible, I think the main area to focus on would be image optimization (and server response time, which sometimes seems rather high, so it seems as though something might not be optimal in W3 Total Cache’s page caching configuration)? * Kind regards, frank Viewing 8 replies - 1 through 8 (of 8 total) The topic ‘Activating CSS Optimizing ends in Error 500 Internal Server Error’ is closed to new replies. * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608) * [Autoptimize](https://wordpress.org/plugins/autoptimize/) * [Frequently Asked Questions](https://wordpress.org/plugins/autoptimize/#faq) * [Support Threads](https://wordpress.org/support/plugin/autoptimize/) * [Active Topics](https://wordpress.org/support/plugin/autoptimize/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/autoptimize/unresolved/) * [Reviews](https://wordpress.org/support/plugin/autoptimize/reviews/) * 8 replies * 2 participants * Last reply from: [Frank Goossens](https://wordpress.org/support/users/futtta/) * Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/activating-css-optimizing-ends-in-error-500-internal-server-error/#post-5799468) * Status: resolved