Title: Minify CSS Error Last modified: August 22, 2016 --- # Minify CSS Error * [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/) * When I select Minify Auto option my website breaks. * I had a look at the source code and by clicking on new generated files: * [http://website.co.uk/wp-content/cache/minify/000000/lZBRDsIwDEMvxCj74B7cYMraVK3olirONHZ7yvhH5Suy7GdLGd1eh5gLD1stQsF5wO2ioSoD08eZvs4EOwpfxj-BCRT5cneBkLKXFdclr01TaHeYSU99c5CSAzaN5BmVfaaSYXBRaeHW_zyHZkL23enEFFjR3y5iMKXaTSCJmpfA_SOx8AstyNqNtNeaHY8kJj-Y891v.css](http://website.co.uk/wp-content/cache/minify/000000/lZBRDsIwDEMvxCj74B7cYMraVK3olirONHZ7yvhH5Suy7GdLGd1eh5gLD1stQsF5wO2ioSoD08eZvs4EOwpfxj-BCRT5cneBkLKXFdclr01TaHeYSU99c5CSAzaN5BmVfaaSYXBRaeHW_zyHZkL23enEFFjR3y5iMKXaTSCJmpfA_SOx8AstyNqNtNeaHY8kJj-Y891v.css) * I am getting following error message: HTTP/1.0 400 Bad Request * Anyone has any idea why this is happening? This only started to happen today and its been working fine for last two months. * [https://wordpress.org/plugins/w3-total-cache/](https://wordpress.org/plugins/w3-total-cache/) Viewing 15 replies - 1 through 15 (of 24 total) 1 [2](https://wordpress.org/support/topic/minify-css-error/page/2/?output_format=md) [→](https://wordpress.org/support/topic/minify-css-error/page/2/?output_format=md) * [bcw00](https://wordpress.org/support/users/bcwint00/) * (@bcwint00) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172234) * There seems to be a problem with the Minify feature on blogs running WordPress 3.9.2. * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172258) * I am using 3.8.1. * It was working great until two days ago. I made no changes to the website. * I tried changing permissions but still no luck. * I tried reinstalling the plugin and the same issues. * Any help would be great. * [Brent](https://wordpress.org/support/users/illegit/) * (@illegit) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172266) * I am having the same problem. My site was working fine a few hours ago. I haven’t made any changes at all. Please help! * I’m using WP 3.9.2 * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172267) * Brent for now try to change Minify mode: from automatic to manual. That will get your website working. * Just wondering why this has happened out of blue for me… * It was working fine for last 3 months. * I tried installing older version of the plugin.. Same issue. * Would love to get this working again. My website was so quick with minify option set to automatic * [Brent](https://wordpress.org/support/users/illegit/) * (@illegit) * [11 years, 8 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172268) * Thanks, but that didn’t solve the issue for me 🙁 * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172315) * Since I haven’t been able to find out the cause of the issues I decided to remove W3 Total Cache. * I am now using WP Super Cache and Autoptimize to minify my JS and CSS files. * Using these two my site seems to be responsive. * I would like to use W3 Total Cache in future. * [rowsdowr](https://wordpress.org/support/users/rowsdowr/) * (@rowsdowr) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172335) * Same error here for minified css files. * HTTP/1.0 400 Bad Request * This is only happenning on one of my blogs though. I have a few other sites running WT3 and minified css files are working fine there. Not sure what the difference is. * [rowsdowr](https://wordpress.org/support/users/rowsdowr/) * (@rowsdowr) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172336) * I’m also seeing this happen for certain minified js files as well. * [rowsdowr](https://wordpress.org/support/users/rowsdowr/) * (@rowsdowr) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172337) * **More info**: * I’m looking at the files under cache/minify and it looks like minified css files aren’t being generated at all. Some minifed js files are created successfully, but not all, and only if I have cdn disabled. * After unchecking “Disable minify automatic file name length test” I now get this error: * > Recently an error occurred while creating the CSS / JS minify cache: No sources > to serve. * Also, I have to correct myself, this problem appears to be happening on all my wp sites now. The others only seemed fine because I hadn’t refreshed the cache. * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172338) * I have the exact same issues as you. I also haven’t made any changes. * I didn’t even have CDN enabled. * I wonder if its silent update to the plugin or wordpress or cpanel that is causing this. * [rowsdowr](https://wordpress.org/support/users/rowsdowr/) * (@rowsdowr) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172339) * Yeah, it’s very strange. Seems to have happened out of nowhere. * Is anyone else with this issue on a **LiteSpeed server**? I just looked into a WP site I have hosted on an Apache server and WT3 minify seemed to work fine. But all my sites hosted on LiteSpeed are experiencing this minify issue. * [Brent](https://wordpress.org/support/users/illegit/) * (@illegit) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172340) * My sites are on LiteSpeed * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172341) * Yes sir. My server is on LightSpeed too. Looks like we have identified the where the problem is. We just have to work out how we fix it. * I tried permissions but maybe 777 php file that generates the minified files.. * [rowsdowr](https://wordpress.org/support/users/rowsdowr/) * (@rowsdowr) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172345) * I submitted a bug report for this issue via the support tab in the plugin itself. The support person replied: * > This should be fixed in the next release, thanks for bringing it to our attention. * He didn’t give me any more info than that though. Others with this problem might want to submit reports too if they haven’t yet. Maybe it will help. * Thread Starter [debianguru85uk](https://wordpress.org/support/users/debianguru85uk/) * (@debianguru85uk) * [11 years, 7 months ago](https://wordpress.org/support/topic/minify-css-error/#post-5172346) * I had to remove the plugin. Is there another way I could submit the bug report? * I am sure someone with good knowledge could identify the cause of the problem. Viewing 15 replies - 1 through 15 (of 24 total) 1 [2](https://wordpress.org/support/topic/minify-css-error/page/2/?output_format=md) [→](https://wordpress.org/support/topic/minify-css-error/page/2/?output_format=md) The topic ‘Minify CSS Error’ is closed to new replies. * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806) * [W3 Total Cache](https://wordpress.org/plugins/w3-total-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/w3-total-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/w3-total-cache/) * [Active Topics](https://wordpress.org/support/plugin/w3-total-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/w3-total-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/w3-total-cache/reviews/) * 24 replies * 8 participants * Last reply from: [Monkey Brain](https://wordpress.org/support/users/milesbaker/) * Last activity: [11 years, 5 months ago](https://wordpress.org/support/topic/minify-css-error/page/2/#post-5172423) * Status: not resolved