Title: Missing CSS Files Causing 404 Errors
Last modified: June 13, 2025

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# Missing CSS Files Causing 404 Errors

 *  Resolved [petruska1](https://wordpress.org/support/users/petruska1/)
 * (@petruska1)
 * [11 months, 2 weeks ago](https://wordpress.org/support/topic/missing-css-files-causing-404-errors/)
 * **Dear MasterStudy Support Team,**
 * I’m experiencing performance issues on my website due to missing CSS files from
   the MasterStudy LMS plugin. The plugin is attempting to load CSS files that don’t
   exist, resulting in 404 errors that are negatively impacting site performance
   and Google PageSpeed scores.
 * **Site Details:**
    - Plugin: MasterStudy LMS v3.6.5
    - WordPress: 6.8.1
    - Theme: MasterStudy v4.8.107
    - Website: ajedrezenminutos.com
 * **Issue Description:** The plugin is trying to load the following CSS files that
   return 404 errors:
    - `/wp-content/plugins/masterstudy-lms-learning-management-system/_core/assets/
      css/vc_modules/courses/style_1.css?ver=3.6.5`
    - `/wp-content/plugins/masterstudy-lms-learning-management-system/_core/assets/
      css/vc_modules/courses/style_2.css?ver=3.6.5`
    - `/wp-content/plugins/masterstudy-lms-learning-management-system/_core/assets/
      css/vc_modules/courses/style_3.css?ver=3.6.5`
 * **Console Errors:**
 *     ```wp-block-code
       GET https://misite.com/wp-content/plugins/masterstudy-lms-learning-management-system/_core/assets/css/vc_modules/courses/style_1.css?ver=3.6.5 net::ERR_ABORTED 404 (Not Found)
       ```
   
 * **Performance Impact:** These 404 errors are causing:
    - Reduced Google PageSpeed scores
    - Failed HTTP requests
      Could you please provide:
 *  1. The missing CSS files, or
    2. Guidance on why these files are being called if they shouldn’t exist, or
    3. A proper fix to prevent these 404 errors
 * I’ve temporarily created empty CSS files as a workaround, but I’d prefer to implement
   the official solution.
 * Thank you for your assistance. Please let me know if you need any additional 
   information.

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

 *  Plugin Support [TomStylemixThemes](https://wordpress.org/support/users/tomstylemixthemes/)
 * (@tomstylemixthemes)
 * [11 months, 1 week ago](https://wordpress.org/support/topic/missing-css-files-causing-404-errors/#post-18517360)
 * Hi 
   It seems you have used Courses grid element in page. The widget is old version,
   and is triggering error in site. To avoid the case you can use Courses widget.
   It is new version of that widget. There you can setup view of widget how you 
   want – [https://prnt.sc/I-kDIgl1zXoy](https://prnt.sc/I-kDIgl1zXoy)If you find
   this difficult we can offer assistance if you provide access to your dashboard!
   Best regards
 *  Thread Starter [petruska1](https://wordpress.org/support/users/petruska1/)
 * (@petruska1)
 * [11 months, 1 week ago](https://wordpress.org/support/topic/missing-css-files-causing-404-errors/#post-18520013)
 * **Hi,**
 * Thank you very much for the clarification! I’ll try using the new **Courses widget**
   as you suggested.
 * If I run into any issues, I’ll let you know.
 * Best regards,
 *  Plugin Support [TomStylemixThemes](https://wordpress.org/support/users/tomstylemixthemes/)
 * (@tomstylemixthemes)
 * [11 months, 1 week ago](https://wordpress.org/support/topic/missing-css-files-causing-404-errors/#post-18523911)
 * Hi 
   We are ready to help with issue. Please, feel free to reach out support service
   if you will need any further help with the case. Through following link you can
   create new ticket – [https://support.stylemixthemes.com/tickets/new](https://support.stylemixthemes.com/tickets/new)
   Best regards!

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

The topic ‘Missing CSS Files Causing 404 Errors’ is closed to new replies.

 * ![](https://ps.w.org/masterstudy-lms-learning-management-system/assets/icon-256x256.
   gif?rev=2846471)
 * [MasterStudy LMS WordPress Plugin – for Online Courses and Education](https://wordpress.org/plugins/masterstudy-lms-learning-management-system/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/masterstudy-lms-learning-management-system/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/masterstudy-lms-learning-management-system/)
 * [Active Topics](https://wordpress.org/support/plugin/masterstudy-lms-learning-management-system/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/masterstudy-lms-learning-management-system/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/masterstudy-lms-learning-management-system/reviews/)

 * 3 replies
 * 2 participants
 * Last reply from: [TomStylemixThemes](https://wordpress.org/support/users/tomstylemixthemes/)
 * Last activity: [11 months, 1 week ago](https://wordpress.org/support/topic/missing-css-files-causing-404-errors/#post-18523911)
 * Status: resolved